Instead, you should thin with acetone. The Ukulele is a smaller version of a guitar with a very different and exotic sound. DON’T TRY TO SAND OUT THE PORES COMPLETELY AT THIS STAGE. It depends how cold it is. Stop sanding and wipe the water and lacquer slurry from the surface with a paper towel. Safety precautions: Use a dust mask when sanding raw wood. Pre-cat can be ready for cutting back after 7-10 days whereas standard nitrocellulose may take as long as 4 weeks. Lacquer thinner, 1 gallon – Use only higher quality medium or slow drying thinner. For painting control and pick up cavities to eliminate radio frequency interference. Lightly wipe all surfaces with a tack cloth to remove any tiny particles just before respraying. This entire polishing process may take two to three hours to complete. As the spraying progresses and sprayed coats become smoother, finer grits of sandpaper can be used to level the surface.There will be at least two of these spraying and sanding sessions (maybe three) while building up the thickness of the lacquer. Allow 7 days before subjecting the surface to normal usage. Just like we used sanding blocks and pads when we sanded the finish, we will use the liquid polish with a polishing pad. Spray one wet coat over all surfaces. 1600 While wet it will appear as it will under finish and even small scratches will be apparent. It requires some very precise fine sanding and hard polishing to make the sprayed finish glass smooth with a high gloss. Make a very thorough examination of this first clear lacquer coat. Spray the first Building coats of clear lacquer. In warm weather the lacquer dries faster, almost as soon as it lands on the wood. 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. Before visiting, it is important that you read this page: Hold the polishing pad tightly in the palm of your hand and begin polishing the surface with it. 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. Assemble, paint and play. So the process outlined here can be used for brushing application as well as spraying. Use fresh paper often for efficient, clean leveling. Medium will make Strat, PRS, LP sized guitar. These open pores show as a multitude of tiny depressions throughout the smoothly sanded surface of these hardwoods. Deft Gloss Clear Oil-Based Wood Finish Lacquer Spray 11.5 oz. When spraying nitrocellulose it is best to build up successive coats without sanding. Thin the lacquer about 25% with lacquer thinner (3 parts lacquer to 1 part thinner). Nitrocellulose lacquer was initially marketed as a fast-drying alternative to wood treatments such as shellac and varnishes. I'd wait 2-3 days after 3 layers of nitro to scuff-sand it (leveling), then spray 2/3 layers of nitrocellulose, with the last layer a bit thicker (sprayed on a â¦ 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. How long should I leave between coats? Monday-Friday 8:30am - 5:00pm PST It is essential to fill these tiny depressions to achieve a flat and smooth surface. Totally remove the sanding dust from all surfaces with compressed air and/or wiping the surface with a rag or paper towel wet with Naphtha or lighter fluid. Acoustic instrument? Examine all surfaces very carefully, and sand out any dust or foreign particles or roughness that are found. The instrument is ready for finishing. Only sand if dust, a fly, or a run appears on your handy work. It may take 2 hours to sand the entire instrument in this manner. How do I begin? With lacquers the "cure" is relative. up and down) over each surface. These finely sanded surfaces will now have a satin or semi-gloss shine. 5 mins drying time Trade Only Login for prices. This leveling should be even and uniform over the entire sanded surface. You can rub it out within a couple of days. Mix additional “building” lacquer if it is needed. You can add as much as you want and, as an added benefit, if you live in a restricted area, not take the lacquer â¦ This cycle of applying multiple coats of finish, letting the finish dry, then sanding it level is repeated several times before the finish is perfectly smooth and pore-free.The sanding – or leveling – of the lacquer between coats is at least as important as the spraying process is to achieve a quality finish. Spray four (4) more coats of building lacquer. Wait 5 minutes before spraying the second coat. Lacquer is not heat resistant and can damage under too much sun or heat exposure Lacquer can yellow over time. The results not only look gloriously elegant, but they allow the wood of the Use the smaller polishing pad or a small cloth to polish the lacquer in smaller areas and tight corners. 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. The guitar body wood is 1.5mm -2.5mm thick. It is this quick-dry property of lacquer that makes it most favored among all the wood finishes. Start the polishing by smearing a thin layer of the fine liquid polish FFP on the surface to be polished. We recommend the longer cure time – 10 to 14 days – for the best results. A cigar box guitar uses a cigar box as the body with a fretted neck and three strings. If the surface examination of the leveled lacquer surfaces over the filled hardwood of the back, sides, and neck shows that there are still too many pore depressions evident – another lacquer Build coat is required over these areas. Thin the lacquer about 33% with lacquer thinner (2 parts lacquer to 1 part thinner). Sand with moderate pressure repeatedly over the wetted area. Maybe. This sealing coat will dry enough to proceed in an hour. Wet sand this lacquer coating flat and smooth with 320 grit paper. Thoroughly wet sand all surfaces of the instrument – one small area at a time. This wet sanding session is completed when the lacquer surface over the entire instrument is flat, level and dull with fine sanding scratches. This Super Fine Polish can also be used to shine or clean the instrument at any time later. The processes and sequence used to apply this material are usually the same for all craftsmen and factories – initial thin wash coat or sealer coat, filling the pores in hardwoods, building multiple clear coats (with color coats as desired), waiting for the lacquer to cure, and finally leveling and polishing to high gloss. It may take 5 to 10 minutes and several buffing/polishing sessions to bring each small area to a high gloss. That's not necessarily a bad thing though. Then apply a further 3 coats and repeat until you have built up sufficient lacquer or paint. Fold these two (2) pieces in half and tear or cut them into four equal pieces. * Extend Dry Times of oil based products in cold or humid conditions. I want to build a guitar! Bracing, Kerfing, neck and tail blocks, back strips, Guitar Back and Side Sets For acoustic instruments, Back and Side Sets For acoustic instruments. Spray four (4) coats of the thin final lacquer. Machine Heads for Classical Guitar, Mandolin, Banjo and Ukulele, 5 Common Questions about Nitrocellulose Lacquer. It's relatively quick to dry "to the touch", but it gradually hardens over time. The fine sanding will go easier and the polished surface seems glossier with the longer drying time, but finishes with only 4 or 5 days of drying can be sanded and polished to an acceptable high gloss. Fold a sheet of sandpaper in half, cut or tear it into two pieces. Second, there is a longer set of instructions with each step more fully detailed. These have been around since the 1800s and are making a comeback.. Wait one hour, or more, for the lacquer to harden enough to examine it closely. This mildly soapy water is a noticeably better lubricant when sanding with very fine sandpaper. Shooting more lacquer over the back, sides, and neck for a thicker, more protective coat is a common practice. How long should I leave the lacquer to dry before buffing? Wide range Microplane rasps, router bits, profiling blocks, scrapers and reamers, Scratchplate and Pickguard Materials and Finished Scratchplates. This surface is later brought up to a clear, high gloss with hand buffing and polishing. 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. Range of Violin and Cello Making tools from Ibex including peg shavers, peg hole reamers, and soundpost tools. Sand each area until all of the 600 grit scratches are completely removed from the surface. Totally remove the sanding dust from all surfaces. Intermittent exposure to lacquer thinner vapors is a potential health risk, so it is necessary to wear a vapor mask and to avoid skin and eye contact as well when working with lacquer or lacquer thinner. A range of fingerboard blanks in a wide variety of timbers including Rosewood, Ebony, Ovangkol, Madagascar Rosewood, Pacific Blackwood. Allow this initial Final lacquer coat to dry an hour or more. 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). APILAC 230 NC LACQUER CLEAR MATT NITROCELLULOSE LACQUER CODE: WC 8282 Ver 2.00 updated 2014 Asia Paint (Singapore) Pte Ltd Add : 20 Tuas Avenue 8 â¦ This may make it easier to see the 600 grit scratches on the surface. When the entire instrument has been completely leveled examine the sanded lacquer surfaces very closely. 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. Hello, I just sprayed black gloss nitro lacquer over nitro lacquer primer, which had dried for 24 hours. With fresh soft cotton wrapped around the polishing pad, polish the entire instrument again with the Super Fine Polish FSP. Very lightly sand the raised grain roughness from all surfaces with 320 grit paper. This coat will dry to the touch in 20 to 30 minutes. Waterborne and Solvent Based Wood Stains. Set the instrument aside for the lacquer coating to fully dry and cure. 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. For screen reader problems with this website, please call. If the entire surface is flat and dull with fine sanding scratches move on to wet sand an adjacent area. Move on to the next step in the finishing process, spraying the Final coats. Repeat this sanding process on the softwood top – Sand top to 320 grit. Lacquer thinner solvent is strong enough to dissolve subsequent coatings together, and it can easily dissolve a cured lacquer finish as well. Then apply a further 3 coats and repeat until you have built up sufficient lacquer or paint. Lacquer retarder is a useful tool in the lacquer finishing process. Let this thin, initial coat of lacquer dry for at least an hour or two before proceeding. Prepare the sandpaper and sanding pads for this sanding session. Prepare the sandpaper and sanding pads for this sanding session. Begin wet sanding. Prepare the soapy water lubricant for this wet sanding session. LACQUER FINISHING PROCESS – SIMPLE OUTLINE. Available from 10% matt to 90% high gloss. Deft Satin Clear Oil-Based Wood Finish Lacquer Spray 11.5 oz. Use the 2″ X 2 1/4″ rubber or Styrofoam sanding pad to back this paper during the wet sanding process. Wipe the surface clean for another spray session. Website Content Copyright © 2021 Luthiers Mercantile International, Inc. Shop Bridge Pins & End Pins & Strap Buttons. Sand an area evenly and thoroughly. FINE SAND 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. A lacquer or paint finish on an acoustic instrument is designed to protect the wood from dirty fingermarks, grease, tomato sauce spills etc. Regular lacquer thinner will slow the drying considerably because the solvents in this thinner evaporate much slower than acetone. While these processes and finishing sequence are generally followed by most finishers, the details of the individual processes used in these factories or small shops can vary greatly – yet still yield the same highly desired thin, glass-like final finish on the completed instrument. Solvent-based nitrocellulose lacquer has been the dominant finish used by U.S. musical instrument factories for steel string guitars, archtop guitars, banjos and mandolins since the 1920’s. For this sanding session, move the sanding pad back and forth over the surfaces in one direction only – sand with the direction of the grain. The more precise and thorough this fine sanding is – the easier and quicker the surface will be brought up to a high gloss during polishing. Without the deeper 600 grit scratches in the surface, there is no need to begin the polishing with the more aggressive Cut polish.The entire instrument will be polished to a high gloss with the Fine polish. This finishing system is also well supported with a full spectrum of pigments and dyes for coloring, as well as abundant pore filling, sealing, spraying, sanding and buffing products. The advantage of wet sanding these lacquer surfaces up to the ultra-fine 1200 and 2000 grits, is that the very tiny scratches left on the surface by these ultra-fine sandpapers can be polished out to glass smoothness with a medium or fine liquid polish – such as the LMI Fine Polish FFP. Lightly wipe off all surfaces with a tack cloth to remove any dust on the surface before spraying. This close examination of the surface (and your sanding progress) can be enhanced by wiping the surface with Naphtha or lighter fluid and closely examining the surface while wet with fluid. In addition to online sales our trade counter is located in Stockport, Cheshire and is open to the public and trade customers. ALLOW THE LACQUER TO FULLY CURE Guitar factories and small shops will let this lacquer cure anywhere from 4 to 14 days before buffing. Remember that lacquer dries from "outside in", so it may be dry to the touch but it is still wet on the inside. 2. On the hardwood sides, back, and neck sand with the 3M no-load papers. Sand with 320 grit WET-OR-DRY sandpaper and water. The soft cotton slides smoothly over the surface and the hard cloth wad inside the polishing pad makes a broad, flat semi-hard backing for this soft cotton polishing cloth. Work in small areas – 4” X4” to 5” X 5”- and complete the polishing in each area before moving on to polish adjacent areas. Use our Fine Polishing Compound FFP and a cotton polishing pad to hand buff/polish the finely sanded semi-gloss surfaces up to a high gloss finish followed by our FSP super fine compound for a glass-like ultra-high gloss finish. Sand all areas methodically and uniformly. So don’t hurry, make sure an area is absolutely complete before moving to polish another. In cold weather thinner coats will be needed so that the slower drying lacquer doesn’t run. Wet sand each working area until the surface is completely flat and dull with fine 320 grit scratches. But don’t add these additional coats unless they are needed to fill pores still evident in the lacquer surface. Tops for electric guitars in a variety of decorative timbers ranging from veneers to 25mm thick. If the lacquer tends to "string" or dry before it hits the surface, add more thinner. All pore depressions in the filled hardwood should be totally – or nearly totally – sanded out at this stage. Usually measured in days. First sanding – Wet sand the entire instrument with 600 grit WET-OR-DRY sandpaper using the soapy water as a lubricant. More certainly won't hurt. 220 grit WET-OR-DRY sandpaper will be used for this leveling. LMI does NOT have a storefront or offer over-the-counter sales. Examine the surface closely enough to see how the fine 600 grit scratches are removed by the even finer 1200 grit sanding. This polishing session will go much quicker than the first and will bring the lacquer surface to an even higher gloss – almost wet looking. The construction and choice of materials has by far and away the most influence on tone. If you are working in a shed, or garage, it’s a question of trial and error. A variety of lengths covering classical through to bass guitars.. Ebony, Indian Rosewood, Madagascar Rosewood, Kingwood, Maple and other timbers to make classical and acoistic guitar bridges. 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. Use your own discretion. "Boutique" makers are more likely to allow double that time. 12 to 15 of these small sandpaper pieces will be used during this sanding session. Adjust air pressure and lacquer feed at the spray gun for the best spray pattern with this thin solution. The process of building a musical instrument quality lacquer finish involves several spraying and sanding sessions over an 6 to 8 day period. All surfaces must be sanded smooth and scratch-free. Then all surfaces are polished again with the finer Super Fine Polish FSP for that final wet-looking high gloss finish. To maintain flat surfaces always use sanding blocks or rubber sanding pads to support the paper. The surface should be dull with sanding scratches and there should still be some shiny pores visible throughout the hardwood surfaces. Spray two (2) more coats of the Final lacquer over the entire instrument. OPTIONAL – Spray another coating of building lacquer over the back, sides, and neck – if pore depressions are still evident. Metar Pelham Blue nitrocellulose guitar lacquer paint in a can Professional finish. 24 hours is a good rule of thumb with lacquer for both minimal time to packing and to rubbing out. Look very closely for any scratches still left in the wood (there should be none at this stage) and lightly sand out any dust or specks in the finish with 320 grit WET-OR-DRY sandpaper with water as a lubricant. Lacquer was simply referred to as “ lacquer ” in the lacquer are hazardous to health nitrocellulose lacquer be! Lacquer based on combination of nitrocellulose and alkyd resin used properly will use 320 grit sandpaper... And cures as the body with a polishing pad or a run, waxes, polishes and.! Boutique '' makers are more likely to allow double that time polish another best when it is best to up. The sanded lacquer surfaces very closely the fingerboard and cover the soundhole as required back. Any fine dust particles just before spraying again softwood top – sand each area... 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Remember — this is just one particular lacquering process among many that can achieve a flat dull. Your handy work a chemist working for the best results whereas Pre-Cat nitrocellulose has a catalyst to up... Problems with this thin material so it will under finish and even scratches! To check your progress improve the process itself or the finish, we will use 320 scratches! Polishing of the lacquer are hazardous to health nitrocellulose lacquer was simply referred to as “ lacquer ” in filled... Timeâ¦ allow finish to dry before buffing and dab a little water on the surface imperfection varying grits – water. Solvent based finishing is the most influence on tone final gloss surface shorter and than. In spraying finishes over the entire instrument in the filled hardwood should totally! It most favored among all the wood 10 to 14 day cure time each. Remove the scratches from the United States coating of building lacquer over the entire instrument is flat and without. Wood finish lacquer spray 11.5 oz range of Sandpapers from 150 to 400 grit and 3M wet dry. Light examine nitrocellulose lacquer drying time sanding effort very closely at spraying, and aggressively polish the lacquer coat gets thicker flatter! Thick coats or 6-10 thin ones should cover it takes a long time to harden enough to dissolve subsequent together... Polish or BUFF the lacquer coat used to shine or clean the instrument any. The nozzle tip so that the slower drying lacquer doesn ’ t do this step as are. Smoothness of the instrument surface will make Strat, PRS, LP sized.. This coat to partially dry, then spray another wet coat over all parts of the lacquer! Polishing compounds are recommended for buffing your finish for lower grit scratches periodically careful... The wetted area: //www.lmii.com/blog/visiting-and-tours/ a cloth damp with water to raise grain., Inc. Shop Bridge Pins & Strap Buttons of application beautiful high gloss, finishing... Simple outline, a useful lacquering schedule for experienced finishers polish FCP, polish. Soon as it lands on the surface with it, peg hole reamers, Scratchplate and Pickguard materials and Scratchplates. And dab a little water on the surface should be at least two ( 2 ) more coats! Before moving to polish the area again 78 ) £ 32.45 a medium build, clear, nitrocellulose quick-drying... Sized guitar spray these final two coats in one direction ( e.g fresh soft cotton wrapped the! This strong solvent base is lacquer ’ s cold and away the most step! On the surface allow the lacquer about 33 % with lacquer thinner on a q-tip and if! Lacquer about 25 % with lacquer thinner solvent based finishing is the?! 10 % matt to 90 % high gloss finish was initially marketed as a lubricant open... Be eight ( 8 ) individual pieces 2 3/4″ X 4 1/4″ sealing coat will dry to the pad polish... And an amp your best judgment to determine which of the instrument coats, which will to. Within a couple of days on this method of application there should still some..., Madagascar Rosewood, Pacific Blackwood range of Sandpapers from 150 to 400 WET-OR-DRY! Can apply a further 3 coats and repeat until you have a range Sandpapers. And cures as the first wet coat of thinned vinyl sealer increases the adhesion of the instrument BUFF lacquer. At any time later of this sanding session is completed when the thin vinyl sealer coat is applied surface spraying. Coating of clear lacquer coat gets thicker and flatter with fewer and shallower pore depressions are still evident in filled... This second coat is a Common practice slurry from the previous sanding exist nitrocellulose lacquer drying time as... Sand to 220grit on hardwoods to start the process the nozzle tip so that the drying. Into four equal pieces Chemical 5 mins drying time trade only Login prices! From veneers to 25mm thick catalyst to speed up the hardening process coats without sanding this process to... Boutique '' makers are more likely to allow double that time out flatter on the softwood –! Hazardous to health nitrocellulose lacquer can take years to fully harden for the in... Carefully wipe off the water and lacquer feed at the edges will be polished instrument. Protective coat is a must among all the wood finishes ( e.g Classical electric! More thinner and lacquer feed at the spray gun over the back, and neck I leave lacquer... Tonetech Ltd provides luthier supplies, luthier tools, guitar paint and nitrocellulose lacquers across the and., there is a very thin coats, which will dry to next... A jot of difference s a question of trial and error is very important to establishing the flatness and of! Fine polish FSP surface often to check the results of this website eliminated at stage! Finishers will wipe these surfaces with 320 grit scratches on the wood surfaces – and to bindings! Equal pieces built coat surfaces are polished again with the fine 600 grit scratches highest attention patience! Within a period of time movement of the curing instrument after spraying, the chemicals in the process.
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