Use your own discretion. Get rid of dust and dirt on the surface you are about to paint. Spray two (2) wet coats of this building lacquer over the entire instrument. Can you send lacquer to me in (France, Sweden, USA etc.)? And although these toxic ingredients evaporate a month or so after application, they’re active during application of the product, so special care must be taken to protect your health when using this paint. UK orders will continue to be shipped as normal with occasional delays in dispatch due to reduced staffing levels during social distancing requirements. The objective of this sanding session is to remove (by sanding) about 1/4 to 1/3 of the thickness of the lacquer coat. Here is the final step, and it involves the application of a clear coat. All eight (8) of the small pieces from one sheet will be used to wet sand the entire body. Cut or tear these four (4) pieces in half. Begin polishing the lacquer with the Fine Polish. This is a very thin solution and will leave only a thin lacquer film over the wood. Nitrocellulose guitar lacquer is an air-drying lacquer which sets through solvent evaporation. Nitrocellulose lacquer is the most common lacquering product in use. When the directions say “spray the lacquer…”, we assume that the craftsman has use of all of the required equipment – compressor, spray gun, ventilated spray booth/area, etc. Apply in thin coats waiting 8 to 12 hours between coats and always sand to tint the previous coat and … As a rule of thumb for nitrocellulose lacquers, apply 3 coats over a 30 minute period, then leave to dry for about 6 hours, or overnight. Tinted nitrocellulose lacquer is coloured but see-through, so the grain shows through from underneath. Lacquer retarder is a very slow thinner – it retards the drying process and allows the lacquer to flow out flat and smooth before drying hard. The process of building a musical instrument quality lacquer finish involves several spraying and sanding sessions over an 6 to 8 day period. Thread starter gtrplr71; Start date Nov 29, 2017; gtrplr71 Member. Easy-to-use bases for the production of tinted enamel systems; High-solids for rapid film build; Resin-solvent combination Polish all surfaces with the Super Fine Polish. guitar paint, nitrocellulose lacquer, tinted lacquer, nitrocellulose guitar paint The top is faded, there are numerous white water marks, and the lacquer is crystallized and flaking in some areas. The lacquer will then lay out flatter on the surface before hardening. You may find it difficult if you do not know the most appropriate materials and the steps to take while painting over lacquer. If the entire surface is flat and dull with fine sanding scratches move on to wet sand an adjacent area. This very flat and smooth surface will make the fine sanding and polishing of the cured lacquer surface an easier task. The first coat should be a light, misting coat to the instrument — often referred to as a "tack-coat." We recommend the longer 10 to 14 day cure time for the best results. Use a vapor mask and latex gloves when mixing and applying finishing materials. Because of the similarity of the names, lacquer is often confused with shellac. Lacquer thinner solvent is strong enough to dissolve subsequent coatings together, and it can easily dissolve a cured lacquer finish as well. Spray these final two coats in exactly the same sequence and manner as the first two Final coats (see above). Olympic White Spray Nitrocellulose Lacquer. When you want to get two layers painted, allow the first one to dry up and then make the surface smooth by sanding it before the second coat is used. With the proper light examine your sanding effort very closely. WET-OR-Dry Polishing Papers – 600/1200/2000 grits for the very fine sanding of cured lacquer before polishing. I need some advice on how many parts thinner and colorant to mix with the lacquer. Adjust your spray gun with less air pressure and adjust the nozzle tip so that this thinner lacquer solution will spray well. These open pores show as a multitude of tiny depressions throughout the smoothly sanded surface of these hardwoods. In the early stages of spraying, the filled pores will show as very minor depressions in the dried lacquer surface. With my thicker finish fill, I like to have a solid three weeks at least for a really good cure, after the last coat is applied. NB. Fold a sheet of sandpaper in half, cut or tear it into two pieces. Rosewood fingerboard. Once the mixture is made, it has a life time of 2 hours to apply it. Examine the surface closely enough to see how the fine 600 grit scratches are removed by the even finer 1200 grit sanding. This fourth step greatly determines how the surface would finally look like. It is much safer than most solvent-based lacquer paints. After numerous coats of lacquer, the finish is very hard, yet somewhat flexible. Every pore depression in the hardwoods should be at least partially sanded. Therefore, the nitrocellulose is generally held in the range of about 45-55% by weight of methacrylate copolymer solids. Rather than list and compare these variations to the entire process, we will outline – step by step – one specific process that will yield a very acceptable final finish, even for a first-time semi-skilled finisher. Do not use cold aerosol cans. 95. This Super Fine Polish can also be used to shine or clean the instrument at any time later. The rights to it were quickly bought by the Ford automotive company. Then all surfaces are polished again with the finer Super Fine Polish FSP for that final wet-looking high gloss finish. The coat makes the surface appear shinier and finer; allow it to dry and wipe it with a cloth. At this point in our process, it will be very important that all of the 600 grit sanding scratches have been totally removed by the previous 1200 and 2000 grit fine sanding sessions. It would be beneficial to add progressively more retarder to the Build lacquer solution as it is built up during the three (3) spraying sessions. Set the instrument aside for the lacquer coating to fully dry and cure. All surfaces must be sanded smooth and scratch-free. We will use 320 grit WET-OR-DRY for this leveling. Menzerna polishing compounds are recommended for buffing your finish. This longer cure time at each stage will assure the best results from the wet sanding and hand polishing. Allow to dry for at least an hour in between coats. Prepare the lacquer mixture for the Final coat. When mixed with pigments, the nitrocellulose made an excellent quick-drying paint… The tinting/toner should be mixed so that it has almost no body (resin content), just color, solvent vehicle, and enough lacquer to act as a binder (not enough to build a film with). DuPont De Nemours. Nitrocellulose Lacquers This type of lacquer is most commonly referred to as regular lacquer, traditional lacquer, or simply NC lacquer. FURTHER COMMENTS AND PROCESS ALTERNATIVES, 7975 Cameron Drive, Bldg. It is best to use the lacquers in humid and warm areas; it dries slowly and is a long-lasting finish. Just like we used sanding blocks and pads when we sanded the finish, we will use the liquid polish with a polishing pad. Spray even coats in a consistent direction across the guitar's top and sides, holding the can 12 to 18 inches from the guitar. Fold these two (2) pieces in half and tear or cut them into four equal pieces. After all, making a guitar – especially an acoustic guitar – is a complex woodworking project requiring a wide variety of woodworking processes, so some woodworking knowledge and skill is assumed. Be cautious, do not spray thick coats of this thinned, retarded lacquer at this time – the solvent action of all the thinner and retarder (slow thinner) in this solution could alter the semi-cured lacquer coating. Prepare the sandpaper and sanding pads for this sanding session. This coat will dry to the touch in 20 to 30 minutes. We suggest using the maximum drying times indicated at each stage. Use progressively finer compounds until you achieve a high-gloss finish. NC lacquers are commonly used for antique restoration and refinishing, reproduction of classic furniture styles, refurbishing older furniture, vintage guitar finishing, pianos and interior general millwork. If you need a dozen coats of any lacquer, something is not quite right. Most lacquers used in woodworking today contain another resin called nitrocellulose, which (along with some other ingredients) allows one thin coat of lacquer to dissolve somewhat with a previous coat. This leveling should be even and uniform over the entire sanded surface. Spray two (2) coats of this Final lacquer over the entire instrument. Adjust your spray gun with more air pressure and adjust the nozzle tip for more fluid to get this thicker solution to spray good wet coats. Ohio Valley Nitro offers a full line of nitrocellulose finishes in 16oz. The wet sanding will be done with very fine grit WET-OR-DRY sandpapers in three (3) separate sanding sessions, each using progressively finer grit sandpaper – first 600 grit, then 1200 grit, and finally 2000 grit. How do I begin? Always use these smaller sandpaper pieces backed by a 2″ X 2 1/4″ rubber or Styrofoam sanding pad. It gives a brightly-colored appearance, and it also dries up fast. 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