Fast lacquer thinners, usually available from auto-body supply stores but not from wood-finish suppliers, are made up of solvents nearer the top of the list. Now add a small amount of lacquer retarder (very slow thinner) to the lacquer solution, enough to equal about 10% of the total solution. It was also combined with pigment to produce one of the first spray-on paints. The process of building the final lacquer coating on the instrument follows this general sequence – first, a few initial thin coats to start building the lacquer, next, apply 4 coats of thicker lacquer as primary building coats, sand/level this coat, apply 4 more building coats, sand/level the surface, and finally, spray a couple of coats of lacquer with more lacquer retarder added to make the final coat lay out very flat and smooth. Spray more Building coats of clear lacquer. Start the polishing by smearing a thin layer of the fine liquid polish FFP on the surface to be polished. OPTIONAL – Spray another coating of building lacquer over the back, sides, and neck – if pore depressions are still evident. This polish is the lubricant, and the abrasive, for the polishing pad. Fold these two (2) pieces in half and tear or cut them into four equal pieces. This strong solvent base is lacquer’s best advantage and primary disadvantage. Instead, you should thin with acetone. Nitrocellulose lacquer is made by mixing fast-drying solvents with wood and cotton pulp containing cellulose that has been broken down by nitric and sulfuric acid. Wet and sand this area again with the objective (see above) in mind. Cut or tear these four (4) pieces in half. Spray with even, overlapping coats in one direction (e.g. Be aware that adding any retarder to lacquer slows the drying and may affect your production (more time between coats and more time before you can deliver or stack parts). 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. These finely sanded surfaces will now have a satin or semi-gloss shine. The time required for the sprayed finish to cure, dry, and harden – enough to wet sand and polish to a high gloss – is generally between 7 and 14 days. You can apply a thicker coat without developing a run. Spray another wet coat of this 50/50 thinned lacquer over the entire instrument. Then apply a further 3 coats and repeat until you have built up sufficient lacquer or paint. Guitar fret wire, nickel silver fret wire, 18% nickel silver fret wire, fret wire for guitars, fret wire for mandolins... Jescar, evo gold fret wire, jescar fret wire, nickel free fret wire, nickel free fret wire for allergy sufferers. * Extend Dry Times of oil based products in cold or humid conditions. So don’t hurry, make sure an area is absolutely complete before moving to polish another. Put some lacquer thinner on a q-tip and see if it softens the finish. Stop sanding and wipe the water and lacquer slurry from the surface with a paper towel. When the whole thing has hardened off, cut it back to create a level and smooth finish. There should be eight (8) individual pieces 2 3/4″ X 4 1/4″. LMI does NOT have a storefront or offer over-the-counter sales. – and that he has some familiarity, skill, and experience in the use of this equipment in spraying finishes. It may take 2 hours to sand the entire instrument in this manner. Maybe. Just like we used sanding blocks and pads when we sanded the finish, we will use the liquid polish with a polishing pad. Now add a small amount of lacquer retarder (very slow thinner) to the lacquer solution, enough to equal about 5% of the total solution. Waterborne Lacquers in Matt, Satin and Gloss. Spray two (2) wet coats of this building lacquer over the entire instrument. Spray two (2) coats of this Final lacquer over the entire instrument. It may take 5 to 10 minutes and several buffing/polishing sessions to bring each small area to a high gloss. Then apply a further 3 coats and repeat until you have built up sufficient lacquer or paint. Very lightly sand the raised grain roughness from all surfaces with 320 grit paper. Continue wet sanding. These open pores show as a multitude of tiny depressions throughout the smoothly sanded surface of these hardwoods. Lightly wipe the surfaces clean with a tack cloth just before spraying again. It is essential to fill these tiny depressions to achieve a flat and smooth surface. The construction and choice of materials has by far and away the most influence on tone. Nitrocellulose lacquer has been used to finish musical instruments for decades. With the proper light examine your sanding effort very closely. Sand with moderate pressure repeatedly over the wetted area. Toll Free: 1-800-477-4437International: 707-687-2020 Increase the retarder added from 5% to 10% by volume on the third spraying over the back, sides, and neck – this will help the lacquer flow out flat and smooth over any pore depressions left in the lacquer surfaces at this stage. The manufacturer should be able to tell you how long before You have a mass of wood, pickups and an amp. This leveling should be even and uniform over the entire sanded surface. side to side). Guitar factories and small shops will let this lacquer cure anywhere from 4 to 14 days before buffing. Sand each area until all of the 600 grit scratches are completely removed from the surface. Lacquer Retarder, 1 pint FLRFT- to improve flow-out, avoid “blushing”. Pre-cat can be ready for cutting back after 7-10 days whereas standard nitrocellulose may take as long as 4 weeks. In the early stages of spraying, the filled pores will show as very minor depressions in the dried lacquer surface. Assemble, paint and play. It's relatively quick to dry "to the touch", but it gradually hardens over time. The main drawback of lacquer thinner solvent based finishing is the hazardous nature of the evaporating solvent itself. POLISH THE FINELY SANDED LACQUER TO A HIGH GLOSS Finishers with some experience may find it beneficial to slightly alter the mixtures of the lacquer solutions so that they spray well in their particular locale or shop situation. Available in a variety of sheens and quality levels, these finishing systems are ideal for use on wood cabinetry, furniture and other interior wood surfaces. Acoustic, Classical and electric necks in a variety of timbers including Mahogany, Spanish cedar, Meranti, Maple, Sapele. FINE SAND THE CURED LACQUER SURFACE Lacquer thinner, 1 gallon – Use only higher quality medium or slow drying thinner. 4 thick coats or 6-10 thin ones should cover it. Mask off the fingerboard and cover the soundhole as required. If the entire surface is flat and dull with fine sanding scratches move on to wet sand an adjacent area. The better you get at spraying, the fewer coats you will need before flatting back. Use this close observation and your best judgment to determine which of the following conditions exist and proceed as directed. The resulting cured lacquer film is excellent for musical instruments. LACQUER FINISHING PROCESS – SIMPLE OUTLINE. Seal the entire instrument with a wash coat of thinned Vinyl Sealer. 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. up and down) over each surface. Lacquer is usually applied by spraying, so the process outlined here will focus on this method of application. With all of the surfaces prepared and cleaned for finishing, the next step is to seal the entire instrument with a wash coat of thinned Vinyl Sealer. Nitrocellulose lacquer sanding sealer Sher-Wood® Low VOC Lacquer Sanding Sealer is a nitrocellulose lacquer sanding sealer for use on interior wood applications. If the lacquer tends to "string" or dry before it hits the surface, add more thinner. Take note that even these more detailed instructions are not intended to teach the inexperienced finisher every minute detail of the woodworking or finishing processes involved here. This is the most important step in the finishing process to achieving a perfect glass smooth final finish. Sand, examine. More certainly won't hurt. I bet it doesn't, but if it does, drop-fill some thinned lacquer into the ding, I use a super-fine brush, several sessions with drying time between, until the ding is filled We have a range of sandpapers from 150 to 400 grit and 3M Wet and Dry papers from 600 to 200 Grit. Before visiting, it is important that you read this page: Toll Free: 1-800-477-4437 or International: 707-687-2020, How to Choose Replacement Steel String Tuners, How to fill tuner screw holes by Robert O’Brien. Third sanding – Wet sand with 2000 grit to further smooth the 1200 grit surface. First sanding – Wet sand the entire instrument thoroughly with 600 grit paper. The fine sanding is completed and the lacquer surface is ready for polishing. Spray two (2) more wet coats of the building lacquer over the entire instrument. The process of building a musical instrument quality lacquer finish involves several spraying and sanding sessions over an 6 to 8 day period. A lacquer or paint finish on an acoustic instrument is designed to protect the wood from dirty fingermarks, grease, tomato sauce spills etc. 5 mins drying time Trade Only Login for prices. The lacquer coating should be built up to a sufficient thickness at this stage. We recommend the longer cure time – 10 to 14 days – for the best results. To maintain flat surfaces always use sanding blocks or rubber sanding pads to support the paper. For screen reader problems with this website, please call. Don’t over sand in any one area. Lacquer thinner solvent is strong enough to dissolve subsequent coatings together, and it can easily dissolve a cured lacquer finish as well. Set the instrument aside for the lacquer coating to fully dry and cure. Use fresh paper often for efficient, clean leveling. It is This is thin material so it will build up and drip easily without continuous movement of the spray gun over the instrument. Wrap one of the small sheets of 220 grit sandpaper around the sanding pad and dab a little water on the instrument surface. In reality the lacquer is microns thick so it won’t affect the instrument. Filling Pores with LMI Water-based Pore Filler, POLISH OR BUFF THE LACQUER TO A HIGH GLOSS, LACQUER FINISHING PROCESS – DETAILED PROCEDURES. Because you can’t see the surface as you work you must get a feel for the change in the surface made by your sanding. However, nitrocellulose lacquer dries slowly compared to modern finishes and itâs far more time consuming and labour intensive to achieve high-quality results with it. Continue polishing with the Fine Polish. Level any minor imperfections with 400 grit WET-OR-DRY sandpaper with a lot of water and fresh paper. Tonetech Ltd provides luthier supplies, luthier tools, guitar paint and nitrocellulose lacquers across the UK and Europe. How do I begin? A cigar box guitar uses a cigar box as the body with a fretted neck and three strings. This wet sanding session is completed when the lacquer surface over the entire instrument is flat, level and dull with fine sanding scratches. We will sand all lacquer surfaces with WET-OR-DRY sandpaper – of varying grits – using water as the sanding lubricant. Regular lacquer thinner will slow the drying considerably because the solvents in this thinner evaporate much slower than acetone. This is the lacquer recipe we will use for the “building” coats – the lacquer mixture is thick enough to build depth, but is thinned and retarded enough to flow out flat and smooth over the surface. Repeat this sanding process on the softwood top – Sand top to 320 grit. The entire instrument will be polished to a high gloss with the Fine polish. Let the first wet coat dry about an hour before the second coat is applied. Hello, I just sprayed black gloss nitro lacquer over nitro lacquer primer, which had dried for 24 hours. Second sanding – Wet sand with 1200 grit paper, remove all 600 grit sanding marks. Nickel Silver repair wire for Martin Guitars. Repeat this sanding process on the softwood top, but you may need to proceed through the finer 320 grit paper for a perfectly smooth, scratch-free surface. 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