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