The safest thing to do is to use dewaxed shellac over the poly and then you can … I think the question boils down to whether you can spray Nitrocellulose Lacquer over Polyurethane. When It really needs some sort of penetration if there's not a lacquer-based sealer or compatible filler it can "bond" to chemically. I've had water base poly peel off when slightly dented, even a cotton rag buffing a sheen to match started a peel over lacquer, once it starts you can't blend in the line, it peels if you keep at it. Then there are the true canalized finishes polyurethane finishes which really... are a bugger to get off. Can polyurethane be used over lacquer? If you are not sure always test. I suggest that you try a test area somewhere on the vehicle where nobody can see 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. This video episode is brought to you by http://CollisionBlast.comToday's question is: Can urethane base coat be applied over lacquer? This post contains affiliate links for your convenience. https://thewoodwhisperer.com/.../shellac-under-polyurethane Just as you can over any Drying Oil. I appreciate all the advice here. However, the oil-based polyurethane is more durable than water-based ones. That will work, but lacquer over oil will result in an "alligator" finish. 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. You can put lacquer over poly, but you need a barrier coat in between. Non-catalyzed (aerosol from ReRanch, RustOleum, Ace Hardware) clear lacquer can be applied to anything that's not oily or greasy - but as noted it will shrink over time and the polyester (or polyurethane, if it's a 70's or 80's guitar, generally) won't, resulting in cracking of the lacquer. Water–based finishes dry fast—most within two hours—so you can apply. Yes, you can put a water-based polyurethane coat over Danish Oil. If you've got enough layers, I think you might need to sand smooth, then polish. Just as you can over any Drying Oil. 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. A quick guide to wood finishes - what to use, and when to use them. Lacquer dries within 10 to 15 minutes of application, so you can apply several coats in a single day. There are all the spray/brush polyurethane consumer grade finishes, these will wrinkle with acetone and or other strong solvents. It only gives a surface coat that is durable . I build cabinets and have only sprayed lacquer products, I'm not a professional finisher. 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. 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. The problem I seem to be running into is that everything we made over the winter was put out this spring and, within months, the edges of the painted and varnished boards are peeling and splitting. It is, however, OK to use an oil-based urethane over shellac. There are water-based polyurethanes not suitable for application over lacquer or shellac. You should not apply your clear topcoat until the stain is no longer tacky and has been allowed to dry at least as long as the label recommends. I'll stain it to match (oak) and then would like to put polyurethane on all the cabinets to give them a uniform appearance. It shouldn’t be a problem getting the poly to adhere to the finish (provided you’ve waited for the Danish oil coat to fully cure). Instead, use an alkyd varnish. You shouldn't use a product over another without knowing first. Polyurethane will not bond or grip well with the lacquer and will peel off over time with general use. Once you are satisfied with the positioning, put a pencil mark on the frame to note the placement of the upper edge of ... Make sure that the brayer is clean before rolling it over the photo several times. … Just smooth the old poly with #0000 steel wool and use a can of spray poly on top. Working the other direction or when you apply other topcoats over shellac, it is often noted that you should not apply polyurethane over shellac. Coating over an old finish has the great advantages of avoiding the always-messy stripping process and greatly reducing the amount of work involved. Note that Annie Lacquer is NEVER applied over waxes! Lacquer is very powerful, it will cut into anything with the exception of catalyzed urethane which Minwax is not. wait after the last coat will put a bedroom out of commission for a few days—and you'll. Most have some texture. 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. But applying a finish over an existing finish is one of the riskiest operations you can do in finishing because it can result in any number of problems. Lacquer can stick to epoxy.At worst apparently the scratches remain clearly visible in the epoxy surface underneath the topcoat, they don't get 'wetted' by the topcoat as they would if you were applying over a layer of the same finish.. One may also ask, what can you put over epoxy? Can You Put Polyurethane Over High Gloss Paint? With some prep work and these simple tips, you can successfully paint over polyurethane or other finished wood and give your furniture or trim a whole new look! It has a few coats of polyurethane on it. In respect to this, can you put polyurethane over oiled wood? Lacquer can stick to epoxy.At worst apparently the scratches remain clearly visible in the epoxy surface underneath the topcoat, they don't get 'wetted' by the topcoat as they would if you were applying over a layer of the same finish.. One may also ask, what can you put over epoxy? Supposedly that barrier coat will protect the poly from being harmed. Can you put lacquer over polyurethane? The lacquer will not bubble the poly. Could I put polyurethane over old polyurethane? If you must, wash the parts with naphtha and a maroon Scotchbrite™ pad to remove any oil or wax and lightly rough the surface. However, you can apply Annie Sloan's soft waxes over the Lacquer. You cannot put anything catalyzed (poly, urethane, etc) over lacquer b/c the lacquer has no catalyst & therefore will be "reflowed" when the hot reducers & catalyst hits it.....resulting in a list of potential problems. You shouldn't use a product over another without knowing first. You need to put a barrier coat in between the two. In this case, it will probably go on OK. Look on the container, and if they drying time is only a few hours to a day, then it is polyurethane. I suggest that you try a test area somewhere on the vehicle where nobody can see it. It will be an adhesion problem. In respect to this, can you put lacquer over polyurethane? Going to try it tonight. Polyurethane is a more durable coating. To get rid of the excess stain now, take a cloth dampened with mineral spirits and use that to scrub down the piece. can you put lacquer over polyurethane? Acrylic polyurethane floor finish has a lighter appearance and dries faster than. Two-component urethanes are too hot to put over lacquers. Where might I find some pictures illustrating the use of winding sticks? Second, polyurethane is not the best choice for painting over lacquer finishes. Tung oil and polyurethane will enhance the natural tone of the wood while keeping the wood form getting brittle and damaged. No. Oil finishes tend to soak into the grain and yellow. Instead, use an alkyd varnish. We had the final coat of polyurethane put on our Use it over chalk paint for a robust finish that will withstand general wear and tear perfect for dining room tables outdoor furniture floors and skirting boards. Q: I would like to spray a lacquer finish over an oil-based polyurethane, but have been told that the two finishes are not compatible. There shouldn't be a problem spraying lacquer over the oil/varnish mix. An example is alkyd, (oil base), over lacquer. 1 Answer. Unlike the lacquer finish, polyurethane does not penetrate the wood. *, Stupid mistake - polyurethane and lacquer, Re: Stupid mistake - polyurethane and lacquer, http://i174.photobucket.com/albums/w120/eddiesatan/DSC01806.jpg, http://i174.photobucket.com/albums/w120/eddiesatan/DSC01823.jpg, Quote from: Tonar8353 on November 01, 2009, 05:50:44 PM, Quote from: SimsCustomShop on November 12, 2009, 01:25:21 PM, Quote from: =CB= on November 12, 2009, 04:16:41 PM, Quote from: MedianMusic1 on November 12, 2009, 04:58:42 PM, Quote from: MedianMusic1 on November 14, 2009, 06:39:22 AM. 0 0. For instance, there are polyurethane floor finishes - one part, air dry, and yes, they do reflow - to a point at least. It can take up to 24 hours to dry hence professional woodworkers often prefer lacquer or water-based polyurethane over the oil-based one. Can you use polyurethane over lacquer on kitchen cabinets? You got it backwards.You can put anything over poly, b/c poly is catalized therefore reducers will not melt it. In short; you CAN apply a lacquer or a polyurethane over a Danish oil. Simply put, shellac covers all. Click to read more on it.Consequently, can you put lacquer over epoxy resin? The best way to repair the lacquer finish is with more lacquer. I had the same question just the other day. Wella..... with due respect, the two-part SprayMax goes over lacquer just fine. Leaving the wood in its natural state, however, does not mean that you should leave it unprotected. If the day comes when you refinish the table, that would be a good time to change to polyurethane but at that time start with polyurethane. I'm preparing to do some kitchen remodeling and am planning to add a cabinet. Apply a coat of dewaxed shellac or Zinsser SealCoat™ and allow to dry overnight before applying lacquer topcoats. You got it backwards. 1 Answer. 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