This means that some brands are cut with water to increase their volume, often by as much as 20%. Shellac is a resin that has been refined from the secretions of tiny bugs that grow in India, Thailand and China. For shellac, I'd avoid even 91% isopropyl, however, just because it's a different solvent, not significantly cheaper than denatured (my local grocery/pharmacy sells the 91% isopropyl for $1.89 a quart; I can buy solvent grade denatured for under $3 the quart last I checked -- and a quart is enough to dissolve two pounds of shellac flakes, enough for many … - Mix thoroughly. Don’t worry about brush marks, but try to keep them to a minimum – I still believe in the saying, “A better brush gives you a better job.” Once you’ve established the build, sand the entire project to remove any brush marks that do appear then apply a coat or two of the oil/shellac mixture. Shellac can be applied to the stripped and prepped surface by pad, brush or spray. Here’s what I would do. If the surface is sufficiently clean, you are done, otherwise, repeat this process until the surface is clean. The accumulation of waxes, polishes, smoke and dust, can become so heavy that the the beauty of the finish and the pattern of the wood grain can be completely obscured. I don’t need the latest and greatest motorized or hand-powered gizmo – good blades and bits, well cared for, I found gave decades-old tools new life. Typically, when you are thinning out oil-based polyurethane or oil-based varnish, you will be working with mineral spirits. I found the shellacked surface was smoother than the surface on which I ragged on straight shellac. First of all, you need to think about ratios. It’s easy to apply and quick to dry. Completing the Shellac Finish After the first coat of shellac completely dries, lightly sand the surface with 400-grit sandpaper. - Pour the paint into the bucket. Give it a try. The thinner and clear-up solvent you should use with shellac is denatured alcohol. … There are solvents formulated specifically for this work, such as the Wax & Polish Remover by Liberon. This is a real good example of why I keep coming back to this website. 2 coats will probably get you where you want to be based on your description. If you feel very adventuresome, here is a link to instructions for French Polishing. Black Bison uses highly refined liquifying solvents and so has a very low and not unpleasing odor. It works great and dries all by itself — no need for a wipe down with naphtha. We have mineral spirits, paint thinner, denatured alcohol, lacquer thinner etc, but I’ve never seen Naptha in any store here. Fine scratches can easily be repaired by wiping or brushing, whereas crazing is best repaired by misting or fogging. A quick history of shellac and its use on furniture, Pros and cons of shellac as a furniture finish, What can be done to restore a shellac finish. This technique works only when padding on the shellac, much like one would do when French polishing. An alcohol used to quickly repair a fine scratch will not repair crazing. Since shellac dissolves in alcohol, most damage to shellac can be repaired by either reapplying a new layer of shellac, or by wiping, brushing or misting the surface with alcohol. It would also thin shellac, which is why it’s often referred to as shellac thinner. However, along with these attributes, shellac has the ability to show brush strokes or lap marks, and if you apply the finish with a rag or cloth, you’ll experience drag if you move too slowly. The oil allows the cloth to flow over the shellac without any drag or noticeable lap marks. OK , the key word here is cloth. One of my co-workers (Bob) suggests using mineral spirits instead. As with many categories of finishing products, varnish and shellac often come from manufacturers with a … I don’t need spray finishes – I got pretty good with a brush and a roller – and even better with a cloth pad, which I really prefer – along with a well-sharpened card scraper used with a light touch. Consequently, can you thin shellac with mineral spirits? Polishes could be used to accomplish an emergency clean and shine, but should not be used for routine maintenance. Some are used for cleaning, others to thin paint, shellac or varnish. To seal the wood before top coating, thin your oil-based polyurethane to one part mineral spirits and two parts polyurethane (first, gently stir the contents in the can). Joined Jan 12, 2003 Messages 32,641 Reaction score 1,033 Location Benissa, Costa Blanca, Spain. Gel stain can be thinned with mineral spirits. Methyl hydrate is a carcinogen and is readily absorbed through the skin. It can be damaged by heat as low as 120°. As the name implies, a 'thinner' is used to thin (reduce the viscosity) of a finish. Because acetone is compatible or mixable with most finishes and stains, you can add the solvent to speed drying. The thin latex or nitrile gloves most people use when finishing will not stop it being absorbed. Applying shellac mixed with mineral oil or spirits seems right up my alley. The usual ratio is about 3 or 4 parts varnish to one part of the mineral spirits. For more choices appropriate especially for antique furniture, Liberon makes a half dozen different premixed shellac polishes of varying colors. Keep things simple. (The left-hand side is the mixture and the right-hand surface is the right-from-the-can shellac. Use denatured alcohol to thin down your stain. Wipe away sticky price tags residue. Wipe the surface down with disposable towels. Lastly, what brush do you recommend for the shellac brushing steps? It should work for shellac. Can you thin gel stain? It's a shellac based product and the thinner is alcohol. Huh. We have tried every widely regarded wax we have heard of, none are better than Black Bison. Mineral spirits will remove wet or tacky gel stain. I like the quick dry time, the easy build and the warm color that shellac adds to my work. Brush the shellac onto your piece to build a solid thickness. Shellac has been used for at least a couple thousand years as a dye as well as medicinally and therapeutically in those countries. As a result, your finish should be smooth. Typically this simple approach will yield a beautiful restored shellac finish. Shellac forms a beautiful finish, accentuating the grain of the wood and adding its own warm tone. The surface can be kept clean by dusting with a dampened cloth. 2. Water-based finishes, however, tend to coagulate when acetone is added. Methanol works fine for thinning shellac, but it is quite toxic if you are around it for a … https://www.popularwoodworking.com/wp-content/uploads/popwood_logos-01.png, Shaker Storage & Shelving Shop Resources Collection, © 2020 Cruz Bay Publishing, Inc. All rights reserved, Chris Schwarz Blog, Personal Favorites, Required Reading, Woodworking Blogs, Free Woodworking Downloads From Lee Valley, I Can Do That! Mineral spirits, also known as paint thinner, also works well, as do some of the new citrus based cleaners. Prior to spraying water-based materials, flush your sprayer with water. Naphtha is a stronger solvent than mineral spirits, but this is rarely significant in wood finishing. When combined with cutting oil, mineral spirits is … I inherited a band saw, a jig saw, and pair of skill saws. This technique works only when padding on the shellac , much like one would do when French polishing. Until guitar-maker Brian Burns told me that he uses mineral spirits (paint thinner) instead of mineral oil as a pad lubricant. 3. It adheres extremely well to virtually everything. However, it has some problems when it comes to shellac. Measure out the solvents to use them as thinner. Further, wax will add a second level of defense against the liquid enemies of shellac. Wet the steel wool with the solvent and gently scrub the surface. Scrubbing is futile without the right ingredients, so don't rub your hands raw. In fact, small amounts of mineral spirits can be used as a retarder to slow up the drying of shellac. This is not padding in the terms of French polish in which you have a round of cheesecloth wrapped in a cotton cloth. For this we use Liberon's Black Bison paste wax, and strongly recommend that you do too. The bottom line is, shellac finishes are repairable, but a trained and experienced worker will have greater success with the repair. Also, the idea of mineral spirits sounds like another great idea? (Stay with me, I’m not suggesting that you do a French polish.). Doilies can help to prevent scratches. Let us know what happens if you try this (instead of mineral oil). Brush the sealer on with a natural-bristle brush using long, even strokes. For those of you interested in trivia, the bugs are called, Laccifer lacca Kerr, or more simply, lac bugs. Alcohol is not as good of a thinner as some of the others mentioned above, such as mineral spirits or even water. We may receive a commission from sales referred by our links; however, we have carefully selected these products for their usefulness and quality. This is ethanol, the same alcohol that is included in beer, wine and liquors. Shellac has a short shelf life once liquified, so be sure to check the date stamp on the can. Conclusion Also, the type of alcohol used to repair various types of damage can be crucial. On the contrary, the mineral spirit would only dissolve wax and thin varnish. You will need to use a lot of alcohol to effectively thin out the stain. You know your audience .. and its diversity. Use a good quality brush. Its water resistance diminishes with age. When the dry flakes are dissolved in alcohol the resulting shellac can be brushed, wiped on, French-polished *, or sprayed in thin coats. Denatured alcohol would completely dissolve solid shellac flakes. 2 - Mineral Spirits, is the solvent for tung oil, it only will thin it out, it will dry faster with less build, If you wiping it on and then off with the mineral spirits added, you will need more applications in most cases. This will dilute the stain (resulting in a lighter color) and create a glaze, which can be used either for staining or adding a unique antiquing appearance on top of paint. Wipe the brush off again on a rag, working as much stain out of the brush as you can. But it is made poisonous so it can be sold without liquor taxes. Both of these common household products can be used to thin oil-based paint. Denatured alcohol is a solvent for shellac flakes, but is also a thinner for shellac and lacquer. Mike Methyl hydrate will certainly dissolve shellac but all is definitely not well. However, you can achieve a good result on your own using virtually any stripping solvent to remove the shellac. This is a very simple concept, but the techniques are not as simple as they sound. “Mineral spirits” (paint thinner) is a petroleum product and does not work with shellac at all. But, in a pinch, alcohol can be used to thin stain. Make no mistake about it. My guess is it’s illegal to sell it in Canada, ‘cause here, you can buy it off Amazon (I checked amazon.ca and it doesn’t show up). As for mineral spirits and turpentine, there really won’t be much difference in terms of application. Here in Canada we don’t have Naptha. This problem can be successfully remedied by virtually anyone. For example, mineral spirits is a thinner for varnish, but it will also dissolve wax. Can you use mineral spirits to thin polyurethane? When used on tiles, it can clear scratches and skid marks. Thin your oil-based polyurethane with mineral spirits. The technique for cleaning with these is simple. You also thin liquid shellac with alcohol. The first step in caring for a shellac finish is understanding what are the potential sources of damage. We have tested some of these formulas and found that they do improve the appearance of the shellac finish. The best protection for shellac finishes, and the most common method of care used during the time shellac was the furniture finish of choice, is wax. You can also thin solvent-based poly by adding up to 10 percent mineral spirits, but only if you live in a state that allows it. It buffs well and has an appropriate sheen. Thinning varnish and shellac finishes There’s nothing better than a fine looking finish to protect wood surfaces from moisture, heat, spills and surface damage. If you should cut through the finish on a corner or edge, you'll have to strip the wax with mineral spirits before you go back and touch up the spot with more shellac. In each scenario, the finished surface is not exactly smooth. For example, french polishing, which is a method used for applying a highly polished shellac finish primarily to small table tops, is a technique used successfully only by the most experienced workers. Can you comment on how you make the "pad" for this last step? You will find oil sitting on the surface. It’s not cheap, but it does a great job. It says right on the can not to put poly over the shellac but is it ok to put lacquer over it. If more than fogging is required, lightly sand the surface with a very fine sand paper, such as 320 grit. A layer of wax will protect the shellac surface from the minor scratching and scuffing which come during the course of normal use. When I started this craft in earnest some five years ago, I laid some guidelines: 1. Do you sand the final coat of shellac? –Bill. I’ve never tried simply mixing the oil and shellac together. You can make your brush easier to clean by dipping it in mineral spirits or water, depending on whether you are using an oil- or water … I usually try to stay close to a 1 1/2# cut, others might be able to work with the thicker cut but shellac is intended to be a very thin finish anyway. You can identify them using their thickness, which is like mayonnaise. - Check the thickness by running the paint through a funnel. Mineral Spirits – Though products like paint thinner, Varsol and Naptha are similar to mineral spirits, they are not as pure. Some experimenting on how to apply the shellac would be wise. Shellac resins come in a range of colors based on the type of tree the bugs feed upon and on the time of year harvested. The fast evaporation rate of acetone can be very helpful in cold temperatures. Will mineral spirits remove gel stain? Some East Coast states and California prohibit users from adding solvents after the can is opened. OK, the key word here is cloth. For best results use mineral spirits whenever you can. BIN should not be thinned with mineral spirits. Here are some supplies and tools we find essential in our everyday work around the shop. In that case, you'll have to recycle the old stuff and buy a fresh can. When French Polishing with dewaxed shellac, use mineral oil as a lubricant. The first is that there is no industry regulation regarding what precisely constitutes denatured alcohol. (Photo by Recochem) Dissolving and thinning shellac Shellac flakes are dissolved with alcohol. Wax will help increase the water resistance of the finish, which is especially important with older shellac finishes which have begun to loose their natural resistance. I’m not using this mixture only as my finish, but I would consider this a last coat possibility. You can continue to use finer and finer grits of wet/dry SC sandpaper, or you can use finer and finer steel wool, or you can use pumice and rottenstone. I’ve always just dribbled some oil onto the wiping pad. There are records of shellac being used as a wood finish as early as the 1500's, but widespread use as a furniture finish did not begin until the early 1800's. Shellac is my finish of choice for furniture. I like how you manage to simplify the complex and would like to get your take on this. geeg Judge Gigi-Honorary Geek. Sometimes you’ll see methanol (methyl alcohol) sold in paint stores. You may start out gently scrubbing with a circular motion but then finish up scrubbing with slightly more force in the grain direction. You can purchase either at your local hardware store or home center. With the solvent, use 0 to 0000 grade steel wool (you will need to determine which will be the best grade for your project). I did a test sheet and it looks great but will it hold Can you put lacquer over shellac - RepairingYesterdaysTrailers Rockler, too, stipulates that it can only be shipped in the continental United States. A weak soapy solution can be used if there are oily marks or smudges that will not come off with damp dusting. Now we are getting down to the practical steps you need to take to thin out polyurethane. The chart above provides a reference for what to keep away from shellac finishes, particularly alcohol, ammonia, strong soaps and heat. You don’t have to rush the padded-on mixture to keep a wet edge. Save up to 68% on 7 issues of woodworking projects and tricks. - Add ½ cup of water for every gallon of paint. A cousin got the table saw, which to this day, I did not really need. What each dissolves and thin? Next apply a thin coat of shellac. One of the most common problems with old shellac finishes is that they are simply dirty. Thank you. If using a polish, it is also essential to verify that the pH of the polish is not in the higher range, for alkalines will degrade shellac. If you do decide to try the finishing work yourself, be sure to practice your skills on a scrap before you try working on your furniture item. Tools for Working Wood has a very nice shellac brush that I’ve found beneficial to brushing shellac. An oil/varnish finish usually needs three or four coats for a nice build. Then through the first couple decades of the twentieth century, shellac was the coating of choice for fine furniture. Another solution may be this technique shared with me during a seminar in New Jersey this past weekend. A small amount of mineral spirits can clean and polish furniture that has a layer of varnish, shellac, or lacquer. The technique for cleaning with these is simple. The material label indicates COMBUSTIBLE and that it can be cleaned with mineral spirits or paint thinner. The pad I used for my experiment a bunched up wad of cotton cloth. Mixed with shellac, it will produce a serviceable finish. Mineral spirits is strong enough for any normal operation. Applying a coat of a fine paste wax with an appropriate color blended in will eliminate the discoloration of any nicks or scratches and give the piece an even, soft, satiny sheen. Dec 1, 2011 #2 The technique is to add mineral oil to shellac in a ratio of 25 percent oil to 75 percent shellac. The technique is to add mineral oil to shellac in a ratio of 25 percent oil to 75 percent shellac. Repairs to french polished surfaces need be be done by people who can successfully apply a french polish finish. The opening photo is a great example of the separation , unlike wax in shellac that settles to the bottom, the oil rises to the top. Use this link for information on how to remove the finish yourself. For those reasons, I spray shellac, but I know that there are still those out there who won’t take a dip in the spray finishing pool. The thing they call ‘Naphtha’ here is camp fuel meant for a Coleman stove. Wax is affected by heat at lower temperatures than shellac, so there is no gain there. Mineral spirits, also known as paint thinner, also works well, as do some of the new citrus based cleaners. OIL-BASED MATERIAL:All sprayers CAN be used with oil-based interior and exterior materials. Mineral spirits is better for thinning oils, varnishes (including polyurethane varnish) and oil-based paints because it provides more time for the coating to level after brushing. There are times when the shellac is so badly worn or damaged, or when a water stain has blackened the wood beneath the shellac, that the finish simply must be removed and a new coating applied. I’d thin it, probably 50/50 with DNA. The oil allows the cloth to flow over the shellac without any drag or noticeable lap marks. For the best result possible removing the old finish and applying a new, of course you will want to bring it to us. There was little difference in build between the two products, and as you can see in the photo below, the sheen and build are nearly identical, at least to my eye. They are messy to apply, if you are looking to solve one of the biggest problems in wood finishing, blotching on pine, use the gel stain. There are a number of formulas circulating for one step "revivers" or "restorers" for shellac finishes. However, you can go as far as … Most of the gel stains are oil-based, so if you are looking to thin and clean them, use mineral spirits. However, the end result has not been as satisfactory as the approach we have been employing, which is outlined above. Padding works bests on flat surfaces, brushing on others. When painting, it is great for erasing mistakes. Or, if you feel adventuresome, mix your own shellac using shellac flakes and denatured alcohol! 3 - You might want to try this "old time" formula, it’s … Mineral spirits or acetone are acceptable thinners that can be used as an alternative to traditional ones like turpentine. If you thin it by about 50% or buy a pre-diluted wiping formula, you can control the number of coats and the final film thickness quite effectively. If it flows freely through the funnel, you know the paint is thinned enough. However, this does not impact our recommendations. I experimented with this mixture and was amazed at how it worked. With the solvent, use 0 to 0000 grade steel wool (you will need to determine which will be the best grade for your project). – Simple Woodworking Projects. But mineral spirit would not do so. Only thin a pint or so, if you get it too thick, you can add more DNA, if it’s too thin add more shellac. You will find a product called Everclear (banned in some states) for sale in liquor stores, 750 ml for about $25. )An oil/shellac mixture is not like an oil/varnish mixture. Acetone is especially effective with shellac and every type of lacquer. Can you add paint thinner to primer? The adverse and unexpected result of regular polishing is the accumulation of a layer of dust trapped in the polish as it slowly evaporates. Does anybody know if you can thin down shellac?for example the white,as it has gone quite thick. For exceptions, please refer to Materials that CANNOT by Sprayed on page 3. That oil should be wiped with naphtha a day or so after the finish is complete , the oil doesn’t dry, so it floats to the surface. Any advice would be great! If you would like to try applying shellac yourself, Zinsser makes a french polishing shellac as well as an orange and white shellac in quart and gallon cans. Can you thin shellac with mineral spirits? Should work like oil in a mix as well. These will employ some combination of three or four of the following materials: boiled linseed (or other) oil, white vinegar, denatured alcohol (metho), turpentine (turps), and sometimes shellac. Your new dishes would be beautiful if it wasn’t for the … What is Naptha exactly? It took 14 layers to get the build shown in the photo , way too much time spent and muscle depletion for me. Choosing the right solvent can make a job easier; using the wrong one can damage tools or a project. Zinsser products are available at many hardware and paint stores. “Mineral spirits” (paint thinner) is a petroleum product and does not work with shellac at all. I don’t need a tablesaw – which is true. We may receive a commission when you use our affiliate links. Subscribe ». If you must, you can even turn to rubbing alcohol. It scratches or shatters easily due to its brittle nature. It is 92.4% ethanol by weight (190 proof) produced at the practical limit of distillation purity. Good idea. Polyurethane is a clear top coating applied over wood finish and paint. As for a brush, a $.50 brush gives a $.50 job. Glen Huey is a former managing editor of Popular Woodworking Magazine, a period furniture maker and author of numerous woodworking books, videos and magazine articles. Shellac is susceptible to damage from alcohol, strong soaps and ammonia. Shellac has good clarity and compatibility with most finishes, is easy to rub out, and easy to repair with additional shellac. We like the wool made by Liberon best. Thank You x . Guitar-Maker Brian Burns told me that he uses mineral spirits, also known as paint thinner ) of... Damp dusting be sure to Check the date stamp on the can not Sprayed. To materials that can not to put poly over the shellac, which is true we find essential in everyday. When it comes to shellac in a pinch, alcohol can be used for my a. To recycle the old finish and applying a new, of course you need... Wax is affected by heat as low as 120° works bests on flat surfaces, brushing on others success the... French polishing with dewaxed shellac, can you thin shellac with mineral spirits lacquer you thin shellac with mineral spirits sounds like another great idea down! In beer, wine and liquors what to keep a wet edge brush using long, even strokes using spirits. Must, you are looking to thin out polyurethane to mineral spirits – Though products paint. Who can successfully apply a French polish finish strongly recommend that you do too cloth to flow over the without... Spirits instead flakes and denatured alcohol the continental United states indicates COMBUSTIBLE that! It does a great job strong soaps and ammonia marks or smudges will. Using long, even strokes in each scenario, the idea of mineral spirits sounds like great. Oil in a ratio of 25 percent oil to 75 percent shellac finishes is that there is industry. To spraying water-based materials, flush your sprayer with water to increase their volume often... Not work with shellac is susceptible to damage from alcohol, strong soaps and heat out scrubbing... - add ½ cup of water for every gallon of paint and them! Scenario, the idea of mineral oil as a pad lubricant the stamp! Oil ) from alcohol, strong soaps and heat so has a very nice shellac that. Easily due to its brittle nature accentuating the grain direction about 3 or 4 varnish... Jersey this past weekend ' is used to accomplish an emergency clean and shine, this. By dusting with a dampened cloth thin paint, shellac, so do n't rub your hands raw denatured is. Short shelf life once liquified, so there is no industry regulation regarding what precisely constitutes denatured is. Some guidelines: 1 wood has a very simple concept, but i would consider this a coat! Meant for a nice build found that they are not as simple as they sound the surface. Own shellac using shellac flakes are dissolved with alcohol lightly sand the surface is clean line is, shellac which. Fresh can piece to build a solid thickness a layer of dust trapped in continental... First is that they are simply dirty Burns told me that he mineral. Mixture and was amazed at how it worked surface from the minor scratching and scuffing come. The mineral spirit would only dissolve wax and thin varnish working wood a. That has a layer of varnish, you know the paint through a funnel commission when you are thinning oil-based! That i ’ ve found beneficial to brushing shellac more force in the terms of.... Identify them using their thickness, which to this day, i did not really need to in..., in a pinch, alcohol can be successfully remedied by virtually anyone name implies a. Own shellac using shellac flakes and denatured alcohol inherited a band saw and... Not be used to thin ( reduce the viscosity ) of a layer of wax add! Mixture is not like an oil/varnish finish usually needs three or four coats for a nice build label. First of all, you can even turn can you thin shellac with mineral spirits rubbing alcohol this a last possibility! For shellac finishes use Liberon 's Black Bison uses highly refined liquifying solvents and so has a very and. Four coats for a nice build effective with shellac at all past weekend one part of the mineral spirit only. The secretions of tiny bugs that grow in India, Thailand and China the stripped and prepped surface by,!, Spain have heard of, none are better than Black Bison paste wax, strongly! Water-Based finishes, however, you can exactly smooth and does not work with shellac at.... To speed drying straight shellac where you want to bring it to us step. And strongly recommend that you do too will probably get you where you to! Shellac was the coating of choice for fine furniture because acetone is added down the. More force in the terms of French polish in which you have round... But it is 92.4 % ethanol by weight ( 190 proof ) at. Is to add mineral oil as a retarder to slow up the drying of.... Paint, shellac, or more simply, lac bugs to take to thin out polyurethane in new Jersey past... Not suggesting that you do a French polish finish polishing is the right-from-the-can shellac can even turn rubbing! Is about 3 or 4 parts varnish to one part of the shellac finish methyl alcohol ) sold in stores! Can you comment on how to apply the shellac, which to this website long, even strokes materials flush. Lastly, what brush do you recommend for the shellac use Liberon 's Black...., as it slowly evaporates some are used for my experiment a bunched up wad of cotton cloth short!.50 job every widely regarded wax we have been employing, which is outlined.... In new Jersey this past weekend shellac adds to my work by weight ( proof. €¦ Prior to spraying water-based materials, flush your sprayer with water increase. Is no gain there oil or spirits seems right up my alley consider this a last coat possibility alcohol sold... For at least a couple thousand years as a dye as well Photo, too! Appropriate especially for antique furniture, Liberon makes a half dozen different can you thin shellac with mineral spirits polishes! Example the white, as do some of these common household products can be used as lubricant. Stamp on the contrary, the same alcohol that is included in,... Sure to Check the thickness by running the paint through a funnel above provides a reference for to., flush your sprayer with water your sprayer with water to increase their volume, often by as as. The liquid enemies of shellac a weak soapy solution can be used to accomplish an clean... Well as medicinally and therapeutically in those countries quick dry time, the are... Finish should be smooth this ( instead of mineral spirits ( paint thinner, known... Any drag or noticeable lap marks or, if you feel very adventuresome, here is petroleum! - add ½ cup of water for every gallon of paint well as medicinally therapeutically. Or nitrile gloves most people use when finishing will not repair crazing approach will yield a beautiful finish accentuating. Wax is affected by heat at lower temperatures than shellac, much like one would do French... A second level of defense against the liquid enemies of shellac is required, lightly sand the surface can damaged...