Mineral Oil. 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. 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. 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. The problem is the lacquer thinner in the lacquer. Then the shellac goes on top of the gel stain as a top layer finish. Best of all, an infinite colour palette was opened up. 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 goes over it ok. I've found it to be more of a problem with conventional varnishes than with polyurethanes but it is always a risk. When using a brush only natural bristles should be used, and when wiping it on a clean, cotton cloth should be used. Too thick and it can lead to pre-mature cracking/crazing down the road. 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. Add several more thin coats of lacquer. For these reasons, lacquer is a good undercoat for any other paint product. 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. Under water base, it needs to be absolutely dry, or barrier coated with dewaxed shellac, before applying the finish. 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. Of course you need to test in a inconspicuous place to be sure. Lacquered projects can be gift-ready when other finishes are still stuck in mid-cure. 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. Won't work. Years ago in school we oiled cedar chests to bring out the grain then we used lacquer over it. The safest thing to do is to use dewaxed shellac over the poly and then you can go to the lacquer without worry. The main drawback of lacquer thinner solvent based finishing is the hazardous nature of … Lacquer also comes in various sheens. I have a 50 year old chest that still looks like new. It is also very durable and is used to protect the wood from the elements. 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. Restor-A-Finish does not contain tung oil, linseed oil, polyurethane, or any other type of finish. That changed with the development of nitrocellulose lacquer in the early 1920s. If you google wood finishes you should find lots of info on lacquer and its uses. Nothing touches Fender's "poly" finish. Generally, lacquer is a poor finish when compared with many other finishes. 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. 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. One good coat is all you need. 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. However, it can change color over time and will eventually scratch with continued wear and tear. Greg Williams: The best I’ve used is a shellac sealer from Zinsser called SealCoat. 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. First post on this sub- because the talent here can be a bit intimidating. If another coat is deemed necessary then, once again, this can be applied over the previous coat once this has become tacky. Wood is a substance that moves and changes with climate, treatment and age, as do the finish coatings that are applied to it. So the lacquer paints cannot be sprayed on in a thick coat, or the product will not perform properly. Nitrocellulose was adopted quickly by the car industry and remained the finish … Lacquer can be used over lacquer-base, non-grain-raising (NGR), and water stains, and over lacquer-base fillers. Or with aerosol cans. A pre catalyzed lacquer is better, and a post catalyzed is even better. Applying lacquer does not have to be as daunting of a task as some make it out to be. Type of Finish: Penetrating. It seems that would be the best of both worlds. I've occasionally used it as stain under film finishes. Once applied, it also holds polish very well and can be polished for an even better finish. A wet application can cause many paints and finishes to wrinkle or blister, even an old coat of lacquer itself. Shellac is … But it was the Europeans who elevated decoupage to an art form. One coat is not enough. Yes, Minwax® Lacquer Sanding Sealer can be applied over Minwax® Wood Finish™ stains, Minwax® Water Based Stains and Minwax® Gel Stains. 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. 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. Lacquer needs multiple coats to build sufficient film thickness. The new lacquer dried even faster, and it could be applied using spray guns. David’s Answer:. After you have applied as many coats as you feel necessary, allow the final coat to dry for at least 24 hours. Don't over-do the shellac when you're top coating with lacquer; you want to keep the shellac thin. It works by restoring the existing finish. 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? Bill Snyder. Lacquer can discolor over a … 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. There was a little over-spray on the outside parts but I didn't worry at the time. Yes, you can, but normally one coat of shellac is applied before the gel stain as well. Lacquer paints dry to a hard shell, leaving a very thin paint film. Lacquer can be over-coated with other lacquer, paints, or enamels and acrylics. As far as your spray gun goes, denatured alcohol cleans up shellac better than lacquer thinner. Sanding roughens up the lacquer, which plays an essential role in forming a strong bond between the surface and the finish. In Italy, apprentices applied up to 15 coats of varnish to create a lacquer finish. General Finishes Gel Stains contain urethane, which allows the gel stains to be used for finishing over existing top coats, stains, and paints.. But, spray lacquer dries too fast to be brushed on. This makes lacquer ideal for modern pieces of furniture. This is not a will happen, but some testing is … 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. Lacquer thinner will most likely soften or damage the Waterlox products. Oct-10-2013, 7:59am. Applying pre-cat lacquer. However lacquer may not be the best bet here for a couple of reasons. High-volume, low-pressure (HVLP) spray equipment proves best for application because it greatly reduces bounce-back and overspray compared with conventional high-pressure spray guns. 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. There are drawbacks to lacquer however. For aspiring woodworkers, choosing the right finish can seemingly be a difficult task at least at first. Note: brushing lacquer sprays on perfectly well! Always remember that with lacquer, less is more (so to speak). The very best way to apply lacquer is to spray it. However, the rule of thumb... depends on who you talk to. Avoid the temptation to over-apply the lacquer, as more problems are created by too much than not enough lacquer. Lacquer goes over some poly - but not the same poly that will go over lacquer. Lacquer can be used over lacquer-base, non-grain-raising (NGR) and water-base stains and over lacquer-base fillers. Warmoths is similarly... pretty tough stuff. With luck, applying the finish on your next project may take less time than reading about how it’s done. We used Johnson’s paste wax on the lacquer and to this day it is a great finish. Lacquer works best as a spray finish, applied to dry wood finish-sanded to at least 220 grit. There are risks to spraying any type of solvent lacquer over any existing, and older, paint or finish. Following is some basic advice for applying lacquer with a spray can, brush, and rag. Once it's dry, I've successfully overcoated it with oil varnish, shellac, lacquer, and water based finishes. DIRECTIONS Prepare existing surfaces first by cleaning well. I recently completed construction on a project. Unlike varnish, lacquer is a type of solvent based product. 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. This can be with a spray system. Lacquer goes over shellac and vice versa, pretty well. Lacquer is NOT thinned with alcohol. You might ask to see samples. Over Mineral Oil Waterlox products can be applied over mineral oil as long as it is very dry. HOW TO: USE OIL BASE GEL STAINS OVER EXISTING FINISHES. When the spraying method is used, care must be taken to begin in one area and work outwards. Wait at least 2 weeks after the last application of mineral oil. Lacquer will tend to flow out creating a glassy finish over the course of a few minutes so be patient. Laquer is thinned with alcohol so any water or oil based finish will work over the lacquer sealed wood. Under Lacquer Lacquer should not be used over any Waterlox products. I would think anything you can use over oil based stain would work for sure. Can I use Restor-A-Finish on lacquered pieces? 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