Nitrocellulose was adopted quickly by the car industry and remained the finish … One coat is not enough. Some poly goes over lacquer. Won't work. Shellac is … David’s Answer:. Too thick and it can lead to pre-mature cracking/crazing down the road. Applying pre-cat lacquer. HOW TO: USE OIL BASE GEL STAINS OVER EXISTING FINISHES. As far as your spray gun goes, denatured alcohol cleans up shellac better than lacquer thinner. Lacquer can be used over lacquer-base, non-grain-raising (NGR) and water-base stains and over lacquer-base fillers. Oct-10-2013, 7:59am. Type of Finish: Penetrating. Always remember that with lacquer, less is more (so to speak). Best of all, an infinite colour palette was opened up. General Finishes Gel Stains contain urethane, which allows the gel stains to be used for finishing over existing top coats, stains, and paints.. Because lacquer is typically applied in thin coats, you can often touch up the finish without having to sand and reapply an entirely new coat. Add several more thin coats of lacquer. Note: If you choose to stain prior to applying Minwax® Lacquer Sanding Sealer, be careful not to sand the sealer so aggressively that you go through to the stain and damage the color. After you have applied as many coats as you feel necessary, allow the final coat to dry for at least 24 hours. Lacquer goes over some poly - but not the same poly that will go over lacquer. Lacquer thinner will most likely soften or damage the Waterlox products. Unlike varnish, lacquer is a type of solvent based product. Try it on a scrap piece first as you may need to experiment with dyes in the shellac to get the colour match just right. There are drawbacks to lacquer however. It’s this makeup that allows to provide a particularly intense gloss finish – it contains a solution of shellac in alcohol, which produces a resilient synthetic coating. You might ask to see samples. We used Johnson’s paste wax on the lacquer and to this day it is a great finish. This is not the end of the world, though. Yes, you can, but normally one coat of shellac is applied before the gel stain as well. I've occasionally used it as stain under film finishes. A pre catalyzed lacquer is better, and a post catalyzed is even better. Generally, lacquer is a poor finish when compared with many other finishes. DIRECTIONS Prepare existing surfaces first by cleaning well. Hmm. Years ago in school we oiled cedar chests to bring out the grain then we used lacquer over it. Following is some basic advice for applying lacquer with a spray can, brush, and rag. Over Mineral Oil Waterlox products can be applied over mineral oil as long as it is very dry. The problem is the lacquer thinner in the lacquer. This is not a will happen, but some testing is … Avoid the temptation to over-apply the lacquer, as more problems are created by too much than not enough lacquer. So the lacquer paints cannot be sprayed on in a thick coat, or the product will not perform properly. This makes lacquer ideal for modern pieces of furniture. Lacquer can be used on most woods, but it cannot be used on mahogany and rosewood; the oils in these woods will bleed through the finish. I've found it to be more of a problem with conventional varnishes than with polyurethanes but it is always a risk. This can be with a spray system. Can I use Restor-A-Finish on lacquered pieces? Lacquer goes over it ok. One good coat is all you need. Lacquer can be used over lacquer-base, non-grain-raising (NGR), and water stains, and over lacquer-base fillers. Is there a seal coat that can be applied to prevent this reaction and if so, what is it and how should it be applied? The new lacquer dried even faster, and it could be applied using spray guns. If another coat is deemed necessary then, once again, this can be applied over the previous coat once this has become tacky. The very best way to apply lacquer is to spray it. Can lacquer be applied over oil based finish Post by Millu » Wed Nov 02, 2011 5:49 pm I want to apply a more protective top coat over an existing finish on wooden boards finished in a green colour that I'm not 100% positive how they're finished. But for a wooden picture frame, you don't have to apply nearly as many coats – even just half as much will result in a gleaming lacquer finish. I have a 50 year old chest that still looks like new. When using a brush only natural bristles should be used, and when wiping it on a clean, cotton cloth should be used. The main one is that your lacquer's solvent may be 'hotter' than alcohol and if so the shellac will be soluble in it, which can lead to crazing after application. There are risks to spraying any type of solvent lacquer over any existing, and older, paint or finish. Therefore, if you are looking to paint over a surface with lacquer as the finish, ensure that you sand the surface before you can go ahead with the application of the pain. However lacquer may not be the best bet here for a couple of reasons. Or with aerosol cans. Lacquer goes over shellac and vice versa, pretty well. Of course you need to test in a inconspicuous place to be sure. Even if it has varnish on it, its so old, hard and dry you can get away with putting lacquer over it as long as you don't flood a wet coat on it. Lacquered projects can be gift-ready when other finishes are still stuck in mid-cure. 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. Wood is a substance that moves and changes with climate, treatment and age, as do the finish coatings that are applied to it. Lacquer can be over-coated with other lacquer, paints, or enamels and acrylics. Mineral Oil. Lacquer also comes in various sheens. Definitely! Question from a Student: For high traffic areas, does it make any sense in spraying a protective lacquer finish, after applying the Linseed and Tung Oil finish. It works by restoring the existing finish. Once it's dry, I've successfully overcoated it with oil varnish, shellac, lacquer, and water based finishes. I knew parts of the project would not be accessible after construction so I used some spray on lacquer to get into the tight spaces. Lacquer works best as a spray finish, applied to dry wood finish-sanded to at least 220 grit. For aspiring woodworkers, choosing the right finish can seemingly be a difficult task at least at first. However, it can change color over time and will eventually scratch with continued wear and tear. It seems that would be the best of both worlds. Lacquer needs multiple coats to build sufficient film thickness. When you work on antiques most of the time you can just touch up the finish with lacquer. But it was the Europeans who elevated decoupage to an art form. I recently completed construction on a project. Restor-A-Finish does not contain tung oil, linseed oil, polyurethane, or any other type of finish. If you google wood finishes you should find lots of info on lacquer and its uses. That changed with the development of nitrocellulose lacquer in the early 1920s. Nothing touches Fender's "poly" finish. We have done quite a bit of lacquer over acrylic paints,use it for cabinets,with a decorative glaze in the detail then put lacquer over it. Warmoths is similarly... pretty tough stuff. It is a simple wipe-on, wipe-off process. 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. Lacquer can discolor over a … There was a little over-spray on the outside parts but I didn't worry at the time. The safest thing to do is to use dewaxed shellac over the poly and then you can go to the lacquer without worry. The two easiest ways to avoid problems are to spray se The fundamental issue of course is that the thinners in lacquer when applied over reactive or coalescing finishes act like a stripper; softening and swelling the original finish and leaving a mess. When the spraying method is used, care must be taken to begin in one area and work outwards. A wet application can cause many paints and finishes to wrinkle or blister, even an old coat of lacquer itself. Under water base, it needs to be absolutely dry, or barrier coated with dewaxed shellac, before applying the finish. Note: brushing lacquer sprays on perfectly well! Wait at least 2 weeks after the last application of mineral oil. Lacquer is NOT thinned with alcohol. First post on this sub- because the talent here can be a bit intimidating. Under Lacquer Lacquer should not be used over any Waterlox products. Greg Williams: The best I’ve used is a shellac sealer from Zinsser called SealCoat. However, the rule of thumb... depends on who you talk to. Lacquer will tend to flow out creating a glassy finish over the course of a few minutes so be patient. Bill Snyder. Lacquer paints dry to a hard shell, leaving a very thin paint film. Laquer is thinned with alcohol so any water or oil based finish will work over the lacquer sealed wood. Although nitrocellulose lacquer can be applied by brush (with the addition of retarder ), it is best applied, as intended, with proper spray equipment and some kind of ventilation hood or booth. Lacquer can be used on most woods, but it cannot be used on mahogany and rosewood; the oils in these woods will bleed through the finish. Lacquer can be used to create anything from a deep matte finish to a very high gloss shine. But, spray lacquer dries too fast to be brushed on. 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. If you are talking about spraying lacquer over the polyurethane and the poly is well aged, you might be able to get away with it by spraying light well-thinned coats of the lacquer. Don't over-do the shellac when you're top coating with lacquer; you want to keep the shellac thin. Brushing lacquer is available also. This is because the most popular types of topcoats, varnish, lacquer, polyurethane, and shellac have advantages and disadvantages which makes them best suited for particular types of settings. Once applied, it also holds polish very well and can be polished for an even better finish. With luck, applying the finish on your next project may take less time than reading about how it’s done. 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