The real bottom line is eliminate the first material (water or solvent based) and has enough flow to overcome the laminar flow, and you will never have a problem. This means that when you apply three wet mils, the coating will dry down to one mil. Then after thoroughly rinsing the spray gun, use acetone to spray through and wipe down all the fluid parts. The leftover alcohol I would save in a clean container to use next time when you thin the shellac. From songbirdhd.blogspot.com, the major points are: Use a one-pound cut (one pound of shellac flakes in one gallon of alcohol), which can be sprayed through any spray gun that will spray lacquer. If you have orange peel, it's too much shellac. The hassle is the right space and location for a controlled spray booth. I'm about to make my first go round at spraying shellac using my Graco HVLP sprayer. It can be used with a 5 cfm compressor. Then I disassemble the gun and wipe all the parts with mineral spirits. Clean gun = Better finish! After diagnosing the problem we discovered the hose was plugged up. Use denatured alcohol to clean out the system, not water and ammonia. Forum Responses (Finishing Forum) From contributor G: Thin it out with denatured alcohol. Anyway, I do spray shellac a lot, and cleaning the gun is easier than with other finishes. From contributor G: I'll first spray a little straight DNA through it as well as rinse the container ( this DNA is saved for the brush soaking mentioned above), then soak the whole thing on household ammonia/water in a 5 gallon bucket. I am in the process of switching to waterbase clears, so once I put a new hose on the sprayer I will only be spraying waterbase out of that sprayer. Graco magnum x7 Airless Paint Sprayer Cleaning Instructions. Just let it set up, then soak it for a few minutes in DNA before the next use. Spray thin, even coats. hope it is useful for everyone. Unic Compact Spray Gun Cleaner (Solvent, Water Based or Both. Here's a versatile brush set for cleaning all types of spray guns and airbrushes. If you have a scrap of that bottom molding, try padding it, and see it it gets covered (I'm guessing it won't). Shellac is a new medium for me, and while padding "seems" quite simple, I do believe wholeheartedly in Murphy's Law. The new aircap design is on another level. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. PMM . I could spray the sealcoat out of a pressure pot, but that is a lot slower and makes a lot more overspray. The other day I had my finisher spray some Sealcoat out of one of our Kremlin AAA sprayers. Our Price £584.00 . Thanks, Gary. Order an extra set for cleaning guitar hardware and tools, too! Trade Price £1,195.00 . If you apply a coating with a volume solids of 50%, and you put the same three wet mils on the substrate, it will dry down to 1.5 mils, which it too much. Dry to the touch in five minutes and ready for a recoat in ten. Along with cleaning the brushes and rinsing them with water, a painter should use a spinner to finish the cleaning process. A typical water based coating has a volume solid’s around 33%. Acetone is about the only material besides our Wow you have shared really the nice information. Dust Collection, Safety and Plant Operation, Job Opportunities and Woodworking Services, Advice on maintaining the equipment you use for spraying shellac, and on how to clean equipment when switching between coating types with a single spraygun system. Mario Castelo on 30 May 2017 at 12:57 pm There are also compressor driven HVLP gun’s that work as well or probably better than any turbine driven unit, but they require a beefy compressor, nowadays there is also LVLP (low volume low pressure) who don’t need as a powerful compressor and share the same transfer efficiency. (Finishing Forum) No tannin with shellac 3 or 4 coats sanding lightly between coats and then I pad the last coat. For a better experience, please enable JavaScript in your browser before proceeding. I'll first spray a little straight DNA through it as well as rinse the container ( this DNA is saved for the brush soaking mentioned above), then soak the whole thing on household ammonia/water in a 5 gallon bucket. frenchy | Apr 11, 2007 02:57am | #6. pmmatty, I used to spray all my shellac. That said, with shellac I would think any brush (that does not include the foam thingys) is quite good. Cleaning Your HVLP Spray Gun - 2013 Cleaning Your HVLP Spray Gun CLEANING SUPPLIES 1) Water or Solvent 2) Cleaning buckets for soaking parts, and dumping waste 3) Rags or Paper Towels 4) Cleaning brushes and toothpicks 5) Wrench 6) Gun Oil 7) Safety Glasses 8) Rubber Gloves DIS-ASSEMBLY and CLEANING 1) Pour the material out of your cup. This will allow the sprayer to use his normal spray paths with both coatings. Don't risk damaging your gun with improper cleaning tools—this set is made specifically for safe results. It was mentioned by someone that the gun puts on too much material. The brush spins and centrifugal force releases excess liquid from the brush and keeps the bristles soft. Will I have problems switching back and forth from Sealcoat to waterbase with things getting plugged up? I also like the BLO over the cherry because it tames cherry's tendency to be blotchy. We had a three flush program, and 3/16" ID lines. Dilute ammonia with equal part water. Be sure to rinse the gun with clean water, then store. Those wooden zoom boxes looks great in its texture. As an example, if with water you are using a 12-132 tip, change to a 09-132 for the higher volume solids coating. See Dropdown for Options) Found it cheaper? Another question, I've read you want to thin Zinnser shellac 1:1 w/ DNA (Zinnser seal coat is a 2lb cut, so that would make it 1lb). JavaScript is disabled. Just curious why you wouldn't use shellac over BLO? For shellac if you clean the gun soon after you get done with it, I would put alcohol in the sprayer and spray some through it and change the alcohol and then another wash with lacquer thinner. Rinse through machine and gun well. I generally spray a 1 1/2# cut (with a 2mm needle), and use either 99% isopropyl alcohol or denatured alcohol, depending upon the temperature/humidity. i use purdy brushes, but for shellac i use throw away's. "I long for the days when coke was a cola and a joint was a bad place to be" (Merle Haggard). Heck, I sprayed everything (including my toopaste ;-). Place small projects on a turntable and turn the project instead of moving the spray gun around the project. How do you apply liquid shellac? You can spray many different finishes and paints such as latex paint, oil based paint, shellac, lacquer, polyurethane, milk paint, stains and protectants, etc. I usually do use gel stains, but I didn't want this one too dark. Shellac Flakes (Image: Wikimedia Commons) You need to prepare the surface of the wood before you apply shellac by thoroughly sanding it. The base molding may have to be brushed. I use the older gun to spray shellac sealer coats and the new gun exclusively for waterborne lacquer. Can’t wait to see your results from others woodworkers.” – Bruce Kondracki “I have spray equipment and I use it. Clean your guns thoroughly at the end of each day of spraying by spraying solvent through the gun, wipe off the tips completely and clean the cup inside and out. Your shellac is thin, but you might try a test with a even more diluted solution. The ammonia takes care of everything, then you pour it on the lawn for an extremely green spot to develop (ammonia is a fertilizer). Anything over 5 psi at the gun inlet produces a wonderfully fine and even spray that levels out to glassy smooth in 30 seconds. Be sure to rinse the gun with clean … For different thicknesses different size Fluid Tips are available to … No need to clean out you sprayer until the project is done. It seems to take a lot longer to build up a film thickness when spraying. With more than 12 years as a professional painter in my past, I can brush wood with oil-based enamel that will look like its been dipped in paint, but I'm also a pretty good hand with a spray gun as well. BTW, one of Jeff Jewitt's finish schedules is called a "down and dirty" french polish, used when he needs a fast good looking finish on a small project. I don't want to be buying new hoses all the time. The Gunman 173,361 views. How to Clean a Spray Gun "Properly" - Duration: 11:44. You can also choose to spray the entire drawer, if you prefer—for easier cleaning. December 1, 2009, KnowledgeBase: Finishing: General Wood Finishing. You will need a couple of clean 5 gallon buckets, a rag or two and a small brass or nylon wire brush. It really looks good. After using, wash brush out in solvent, use a wire brush or brush comb to clean very well, spin brush till dry and repeat process with clean alcohol. When switching from solvent base finish to water base, first flush completely with lacquer thinner, followed by alcohol or acetone then finally flush with water to prep the equipment for the water based finish. Personally, I spray a 1.5 lb cut shellac with a tiny bit of turpentine as a retarder, using an Iwata LPH400 with a 1.2mm needle/nozzle setup. Plus, a clean 1 gallon bucket would be useful. As an example, we installed a robot system with both epoxy and polyurethane coatings, which are harder to flush then water and solvent based coatings. Why not spray? I then spray ammonia through the gun. I have a small compressor based spray gun which I always use for shellac. Could not be happier. It is not really the cleanup time because I can clean my spray gun in 20 minutes. Thanks for sharing such a useful info about the furniture. On your spray guns you will need to take the fluid nozzle and needle assembly apart to get it completely clean. I then leave some clean solvent in the cup(2 oz.) First, before you use the brush, pre-wet with clean alcohol. Good respirator, spraying would be useful your gun with clean alcohol awful time brushing shellac when! Not really the cleanup time because I can clean my gun after using water-base materials is with water, clean. Can be sprayed, so I used an HVLP gun, use to! A three flush program, and one for the higher volume solids coating cleaning airless... Cleaner Found it cheaper solid’s around 33 % denatured, though probably necessary. Hvlp gun, use acetone to spray through and wipe all the time different size fluid Tips available. 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