With all the modern advances in coatings -- polyurethane, shellac, urethane, or varnish -- some confusion about formula is to be expected. If you must, wash the parts with naphtha and a maroon Scotchbrite™ pad to remove any oil or wax and lightly rough the surface. I'll stain it to match (oak) and then would like to put polyurethane on all the cabinets to give them a uniform appearance. Can you use polyurethane over lacquer on kitchen cabinets? You can either use a vinyl sealer or dewaxed shellac as the barrier coat. It also can go over oil-based finishes and can be applied using synthetic-bristle brushes, a foam roller or a rag, as can other water-based polyurethanes. Professional wood finishers, who work on fine wood furniture, almost exclusively use lacquers. Apply a coat of dewaxed shellac or Zinsser SealCoat™ and allow to dry overnight before applying lacquer topcoats. Subsequently, question is, can you put polyurethane on countertops? The thing about varnishing over wax is that wax is slippery old stuff and it takes an age to fully cure. Most professionals agree that water-based varnish is the best product to use over paint. Oil based poly offers more colour depth and shine. Also, can you coat polyurethane? All have their pros and cons but when it comes to clear coat for automotive finishes polyurethane is state of the art for today at least. The original cabinets have lacquer on them....well dried and well adhered. Is it possible to spray a 2 part clearcoat (Poly/Urethane) over the acrylic lacquer, perhaps using some intermediate layer between them so there's no reaction. Many individuals use these terms interchangeably, but there is actually quite a difference between lacquer and polyurethane. Yes, sometimes I will apply lacquer over a hand rubbed oil finish in order to get the depth and beauty that the slow drying oil/varnish blend brings out, while gaining the protective properties of lacquer. Top. Use a bristle brush, preferably of high-quality natural bristles, to apply the lacquer. View Entire Discussion (6 Comments) More posts from the DIY community . Created from synthetic compounds and first used during World War II, polyurethane is a polymer that is strong, durable, and arguably the most popular of all topcoat finishes currently in use today. A dust mask will not protect you from the vapors of lacquer. 5.8k. can you put epoxy resin over lacquer, Resin is an ill defined term and has been used for a wide range of substances. The rattlecan finish was easy and cheap, but I would like something tuff. Last time I used Rust-Oleum water-based matte polyurethane. OldDupontGuy. While you can add a layer of polyurethane to laminate flooring, it's really not the best material to use. Oil-Based Polyurethane Looks . It isn't unusual to clear-coat an acrylic paint finish on a metal surface, such as on an automobile, with CAB-acrylic or acrylic lacquer. To add fish-eye eliminator to oil-based varnish or polyurethane, thin with a little mineral spirits or naphtha first to make it easier to stir in. Hi Mark, can you be more specific about what you want to put on top? Dullness. Now that you know the basics let’s get into the true difference between lacquer and polyurethane is. I'm preparing to do some kitchen remodeling and am planning to add a cabinet. The title says lacquer but the body text and the tag suggest you want to use polyurethane (which generally refers to varnish). You can never reconstitute polyurethane once it has hardened. 2008-12-17 02:10:12. Answered. When you spray lacquer over a solvent-based acrylic finish, they combine to form a hybrid film, even if the acrylic is pigmented to form a paint. Its looking a little dull and I want to "re-poly" it but not re-stain it. Polyurethane varnish is one of the best finishes for a countertop-- it's durable and, when applied properly, can be just as subtle as lacquer. Understanding the differences between lacquer vs. polyurethane durability can help you to make a wise choice when it comes to finishing your latest project. You can see that a band saw is a band saw and not a table saw (even though both have a table) and that a mortise-and-tenon is not a dovetail. You can't sand down laminate in order to get the polyurethane to stick, so there's no way to improve the cohesion between the two. Lacquer can discolor over a long time. Step 7 Run your hand over the frame during a "dry phase" to ensure that the surface is perfectly smooth. However, over time, oil poly tends to darken, thus becoming yellow. Some people like that and others don't. Before you decide to go forward with the NC lacquer, you should know that if you ever want to apply another coating over it, such as a polyurethane, you will probably experience lifting. This product can actually be used on wooden floors. Will just some light sanding and reapplying a couple coats of straight poly be ok? It is appropriate that you remove all the traces of grease on the oil-based finish using the procedures highlighted earlier on in this article. It was fine, but I wasn’t impressed enough with it to use it again. As Tonar mentioned you can shoot poly OVER lacquer; but spraying lacquer on top of poly will tend to leave a melted, bubbly gooey mess. Poly, lacquer, waterbased poly…. A brand of real tung oil is Hope's Tung Oil. 4 answers Hillela G. on Mar 2, 2017. I suggest that you try a test area somewhere on the vehicle where nobody can see it. For example, polyurethane and lacquer look the same, both in a can and on the wood, even though they have very different characteristics. Could I put polyurethane over old polyurethane? On the bright side, polyurethane adheres well to most surfaces and can be applied over oil-based coats. For water-based finishes, use a compatible “emulsified” fish-eye eliminator. Varnish can be used to protect, preserve, and enhance paint. If it really is tung oil, it won't work over lacquer or polyurethane. Top Answer. POLYURETHANE: Polyurethane is a totally man made set of synthetic organic compounds first invented in World War II. I proceed in the usual manner of sanding the wood to 320, then applying the General Finishes Seal a Cell as the first coat. You got it backwards. woodworking. The lacquer will not bubble the poly. Spray lacquer is commonly used on new furniture and in new construction. But it is a finish that has been used on furniture for a very long time so I wouldn’t really consider it an inferior finish. Lacquer vs. Polyurethane. Easiest thing would be to just continue with the poly, doesn't sound like you're that far from being done. It was stained with a stain containing polyurethane. In contrast, woodworking is physics. See Answer. You can choose from polyurethane, lacquer, shellac, or even varnish. Answer + 1. Re: Stupid mistake - polyurethane and lacquer Poly over lacquer is ok, lacquer over poly won't work because the thinners are to hot and they will melt the poly. Repeat the process, apply a coat of varnish, and let it dry until you achieve the lacquer finish you desire. Posted by 3 days ago. Best of all, applying polyurethane doesn't require spray equipment and is a job you can easily do yourself. If you paint over it prematurely it could cause a reaction and I would never advise anyone to put a waterbased product over the top of a petrolium based product that hasn’t cured. Some of these water-based finishes are not for use over lacquer or shellac. It is necessary that the surface be abraded--220 or 320 grit will work fine--so that the varnish has some … You can put anything you want over shellac. You can put anything over poly, b/c poly is catalized therefore reducers will not melt it. Best of all, applying polyurethane doesn't require spray equipment and is a job you can easily do yourself. – Graphus Oct 8 '18 at 12:09 Lacquer has a high VOC (volatile organic compound) content, which makes it dangerous to use without a respirator that has an organic vapor cartridge. 1968 Coronet R/T ACTS 16:31. Wiki User Answered . I understand that Polyurethane or Urethane clearcoats are more durable - harder and gasoline resistant than lacquer. Oil finishes tend to soak into the grain and yellow. Some believe that a good quality shellac finish is just as good as any other finish out there, but those guys also happen to sell shellac so it’s hard to say. Beauty is in the eyes of the beholder they say. Lacquer. Brush-on lacquer will dry quickly but is formulated to give you at least a little bit of time to apply and even out the finish. Polyurethane is a more durable coating. I have a butcher block counter top on the kitchen island. While some polyurethane varnishes are very picky about to what substrates they will adhere, if you should want the kind of additional durability that you are aiming for you can use a traditional resin varnish over shellac (dewaxed or with the natural wax still included) or lacquer. You can add additional coats later to even out the finish as needed. Can you use polyurethane over a lacquer finish on wood? Water-based oil-modified polyurethane is a relatively new product that combines the durability of an oil base with the cleanup of a water base. 7 8 9. OldDupontGuy's Profile; E-mail OldDupontGuy; OldDupontGuy's Website; Top Contributor. Lacquer dries within 10 to 15 minutes of application, so you can apply several coats in a single day. It dries way to fast, does not self-level, and has ruined more than one project of mine, so that wasn’t even an option. Minwax Polycrylic is junk, in my humble opinion. You may need to apply more coats of acrylic varnish to "raise up" the lacquer finish to the level of the photograph. You can also find polyurethane in paints, foam cushions, and many other products as it provides strength while being durable and flexible. Simply so, can lacquer be sprayed over polyurethane? However, I can't guarantee that the NC lacquer will adhere to the well cured polyurethane. It will leave a sticky mess which won't every really dry. I needed to just put a clear water-based polyurethane over the paint. One word of caution – read the label carefully and follow the specific instructions. There is a problem with putting lacquer over poly. In varnish making, resin can be a viscous liquid often derived from coniferous plants, such as balsam, or rosin. You need to put a barrier coat in between the two. It used to be lacquer, then enamel, urethane, polyurethane, now water based enters the picture. What are cons and pros of each and in what scenario you should choose one over the other? A quick guide to wood finishes - what to use, and when to use them. Be certain to work quickly adding a thin coat, but don't over-brush your work. It's all subjective. I used it on a project; it was interesting to use, but really polyurethane is better. Polyurethane varnish is one of the best finishes for a countertop-- it's durable and, when applied properly, can be just as subtle as lacquer. It will be an adhesion problem. Out on a limb here - polyurethane over nitrocellulose paint is usually safe if the nitroucelluose paint is old and isn't gassing off any more. Hi, you can certainly use ASCP over Polyvine if you fancy a change of colour, no problem. It can also be a fossilized resin such as amber or copal or Kauri gum (fossilized Kauri tree gum found in New Zeland and similar to amber.) Asked by Wiki User. Also, do you want to keep the bench outside after this? 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