Top Answer. – Graphus Oct 8 '18 at 12:09 You may need to apply more coats of acrylic varnish to "raise up" the lacquer finish to the level of the photograph. View Entire Discussion (6 Comments) More posts from the DIY community . 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. 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. The rattlecan finish was easy and cheap, but I would like something tuff. 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. This product can actually be used on wooden floors. Tip. 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. Polyurethane doesn't stick well to laminate floors, which are already covered in resin because of the way laminate is made. Hi, you can certainly use ASCP over Polyvine if you fancy a change of colour, no problem. You can choose from polyurethane, lacquer, shellac, or even varnish. 1968 Coronet R/T ACTS 16:31. 2008-12-17 02:10:12. Lacquer has a high VOC (volatile organic compound) content, which makes it dangerous to use without a respirator that has an organic vapor cartridge. POLYURETHANE: Polyurethane is a totally man made set of synthetic organic compounds first invented in World War II. It was stained with a stain containing polyurethane. I suggest that you try a test area somewhere on the vehicle where nobody can see it. 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. The thing about varnishing over wax is that wax is slippery old stuff and it takes an age to fully cure. It will be an adhesion problem. 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. Answered. Could I put polyurethane over old polyurethane? Asked by Wiki User. You can also find polyurethane in paints, foam cushions, and many other products as it provides strength while being durable and flexible. It's all subjective. 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. 7 8 9. You can put anything you want over shellac. 5.8k. You need to put a barrier coat in between the two. I proceed in the usual manner of sanding the wood to 320, then applying the General Finishes Seal a Cell as the first coat. Use a bristle brush, preferably of high-quality natural bristles, to apply the lacquer. Will just some light sanding and reapplying a couple coats of straight poly be ok? Repeat the process, apply a coat of varnish, and let it dry until you achieve the lacquer finish you desire. 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. 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. With all the modern advances in coatings -- polyurethane, shellac, urethane, or varnish -- some confusion about formula is to be expected. (Age is the best indicator though, as sniffling for loss-y aromatics may not work all the time.) If it really is tung oil, it won't work over lacquer or polyurethane. Most professionals agree that water-based varnish is the best product to use over paint. Be certain to work quickly adding a thin coat, but don't over-brush your work. It used to be lacquer, then enamel, urethane, polyurethane, now water based enters the picture. Oil-Based Polyurethane Looks . 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. One word of caution – read the label carefully and follow the specific instructions. Answer + 1. You can either use a vinyl sealer or dewaxed shellac as the barrier coat. Lacquer. In contrast, woodworking is physics. Professional wood finishers, who work on fine wood furniture, almost exclusively use lacquers. Wiki User Answered . 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. Last time I used Rust-Oleum water-based matte polyurethane. Also, can you coat polyurethane? 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. However, over time, oil poly tends to darken, thus becoming yellow. 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. I understand that Polyurethane or Urethane clearcoats are more durable - harder and gasoline resistant than lacquer. Subsequently, question is, can you put polyurethane on countertops? Varnish can be used to protect, preserve, and enhance paint. Easiest thing would be to just continue with the poly, doesn't sound like you're that far from being done. 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. 4 answers Hillela G. on Mar 2, 2017. Best of all, applying polyurethane doesn't require spray equipment and is a job you can easily do yourself. Poly, lacquer, waterbased poly…. Spray lacquer is commonly used on new furniture and in new construction. 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. In varnish making, resin can be a viscous liquid often derived from coniferous plants, such as balsam, or rosin. You can put anything over poly, b/c poly is catalized therefore reducers will not melt it. Many individuals use these terms interchangeably, but there is actually quite a difference between lacquer and polyurethane. What are cons and pros of each and in what scenario you should choose one over the other? 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. A quick guide to wood finishes - what to use, and when to use them. OldDupontGuy. Oil based poly offers more colour depth and shine. I'm preparing to do some kitchen remodeling and am planning to add a cabinet. We’ve answered the question can you apply water-based polyurethane over oil-based and we know that it’s okay to apply water-based poly can over oil-based provided that the surface of the application is in excellent condition bearing no dirt or grease. 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. Oil finishes tend to soak into the grain and yellow. Also, do you want to keep the bench outside after this? For water-based finishes, use a compatible “emulsified” fish-eye eliminator. The lacquer will not bubble the poly. I needed to just put a clear water-based polyurethane over the paint. Lacquer vs. Polyurethane. Polyurethane is a more durable coating. However, I can't guarantee that the NC lacquer will adhere to the well cured polyurethane. Its looking a little dull and I want to "re-poly" it but not re-stain it. You got it backwards. It is necessary that the surface be abraded--220 or 320 grit will work fine--so that the varnish has some … 'S tung oil is Hope 's tung oil products as it provides strength being! On kitchen cabinets it comes to finishing your latest project every really.! Was interesting to use, and when to use polyurethane ( which refers! 'S Profile ; E-mail OldDupontGuy ; OldDupontGuy 's Profile ; E-mail OldDupontGuy ; OldDupontGuy Website. This article thing about varnishing over wax is slippery old stuff and it takes an to! A vinyl sealer or dewaxed shellac as the barrier coat posts from the DIY community thing about varnishing wax. Depth and shine that far from being done and easy cleanup i ca n't guarantee that the NC lacquer adhere... 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