Use lacquer thinner to thin lacquer and denatured alcohol to thin shellac. Test the substance on scrap wood. Use a narrow/fine tip, and keep the pressure low. Oil-based varnish, including polyurethane varnish and oil paint, can also be sprayed, of course, b The exception is oil-based finishes. Woodworker's Journal Adirondack Lawn Chair Plan - Reprint, Woodworker's Journal 25 Jigs and Fixtures, CD, The Way to Woodwork — Mastering the Table Saw, DVD, Civil War Officer's Chair Downloadable Plan, Ultimate Miter Saw Stand - Downloadable Plan, Woodworker's Journal September/October 2014, Solid and Plywood Cherry Darkening at Different Rates, Woodworking | Blog | Videos | Plans | How To, Order Woodworking Plans, DVDs and Supplies. swan1 | Posted in Finishing on April 10, 2007 11:10am Hello All, ... That's why you thin it so much.. start on the top and flood it on.. don't go back to touch up anything,, jus' slop 'er on! For WB lacquer I used the #3 needle (blue cap) which is 1mm. Understand the difference between oil- and water-based poly. Though they do not sell to the public in small quantities, Homestead Finishing, a finish supplier, does, repackaging and selling it under the name Shellac Wet. For starters, this type of stain contains very, very toxic VOC’s that can be very dangerous… thinning the … Chalk style paint is … Ya didn’t say what kind of project. Woodworker's Journal Adirondack Lawn Chair Plan - Reprint, Woodworker's Journal 25 Jigs and Fixtures, CD, The Way to Woodwork — Mastering the Table Saw, DVD, Civil War Officer's Chair Downloadable Plan, Ultimate Miter Saw Stand - Downloadable Plan, Woodworker's Journal September/October 2014, Rubbing Out a Great Finish: Satin or Gloss, Glazing: An Easy Way to Add Color to Wood, Woodworking | Blog | Videos | Plans | How To, Order Woodworking Plans, DVDs and Supplies. Spraying overcomes this problem. He mentions, however, an additive that reduces surface tension and gets great results when spraying shellac. Once the gun is set up, hold it about eight inches from the wood and keep it moving at right angles to the spray fan at all times. If your brush isn't dripping, it's too dry! Spraying Shellac-Based Primer. Start at lower pressure, apply some finish, raise the pressure, spray another coat on the next piece of scrap and so forth. You can thin them as much as you like, since thinning will not change the coating that is formed. If your water-based polyurethane is a little older and has a thin skin formed over its surface, you may need to treat it to make it usable again. Spraying Solvent and Water-based Coatings In the 1920s shellac was replaced in factories by lacquer for two primary reasons: shellac resin (from bug secretions) is a commodity product that was going up in price as demand increased, while lacquer was going down in price; and lacquer thinner (a blend of … Choose the right tip for the material you are spraying, and test the spray pattern first on scrap wood or cardboard. I can think of another source too--hardware and paint stores, where it is sold to thin shellac (duhhhh). I like the quick dry time, the easy build and the warm color that shellac adds to my work. I shot a short video showing that I sprayed the table with 6 coats of shellac. Discussion in 'Spray Painting' started by joe brierley, Mar 26, 2018. Resist the impulse to swing the gun upward at the end or beginning of the spray path, as that will leave you with insufficiently coated ends and flooding in the center. Here's a little detail on thinning shellac, with a discussion of the fine points of various alcohol varieties. Print. Continue until all the nails have an even … Spraying shellac. Because it dries more slowly than any of the other types of finish, it’s quite easy to spray heavily enough to get sags and runs. STEP 2: Test your mixture on a scrap wood. The ratio of alcohol:shellac is also finicky and plays a huge roll. We also like spraying dewaxed shellac (such as Zinsser Bulls Eye SealCoat), and solvent-based lacquer. Unless you thin shellac a good deal, it has a tendency to ridge at the edge of brush strokes and orange peel when sprayed. Mist the wood quickly with this fog, then wait about three or four minutes. The water will cause the shellac to turn white, or “blush.” If you have access to 95-to-100 percent pure propanol or isopropyl alcohol, you could use it for thinning without a problem. I think Minwax is a "brushing" lacquer, so is has a retarder added making it “brushable” offering a slower dry, allowing flow out, because a brushing lacquer requires more "open time" than spray. I get the best results using flake and regular denatured alcohol. The ratio of alcohol:shellac is also finicky and plays a huge roll. This includes cleaning, de-glossing, sanding, and caulking the cabinet door panels. Discussion in 'Spray Painting' started by joe brierley, Mar 26, 2018. Play with the gun a bit and you’ll be in charge before you know it. We also like spraying dewaxed shellac (such as Zinsser Bulls Eye SealCoat), and solvent-based lacquer. Just put them in the alcohol, and stir several times a day, and they will eventually completely dissolve. You will find that water-based coatings generally spray quite nicely right out of the can with no alteration needed. Spraying oil-based polyurethane or varnish is not a huge problem on horizontal surfaces, which will flow out, but be prepared to spend a bit of time getting used to how varnish hangs on vertical surfaces. You can use an electric cup gun (like the Wagner Optimus Sprayers), or you can use an airless rig. As long as the temperature is higher than 10 degrees you should be fine. Now come back and spray a light, even pass until the wood is just barely wet. Use a two or three-pound cut of shellac and apply generously with long, smooth strokes. It will merely allow you to spray less finish per pass and drop the viscosity of the finish to make it flow more easily. Adjust the airflow, fluid trigger and the fan shape and width. Before spraying primer, you should have already prepped your cabinets for primer and paint. I've only sprayed zinsser bin once before when I was new to spraying. All of these alcohols except rubbing alcohol will thin and clean up shellac. It’s practical to make a 2lb cut for general application. However I make shellac from flake as it lasts longer and only make 4 ounces at a time in a 3# cut , then dilute to suit project. Well, it wasn't long before the gun clogged up on me, requiring an annoying amount of time to clean it out. In Rob Johnstone’s response to Spray Finish, he recommended using amber shellac to finish pine – which I agree with. Keeping it cool will increase mixed shellac's shelf life. Are ya gonna substitute shellac for lacquer? Shellac is so easy to wipe on the spray routine is just not needed. Add 1 to 1/2 ounces of water to the mixture and stir it with the wire whisk. How thin you make it is a matter of personal taste and technique, but you can thin it as much as you like with no ill effects. The strategy is to thin the finish with a lot of fast-evaporating solvent. You can slow down the evaporation by using a slower evaporating alcohol, like Butyl Alcohol. It takes a while for the flakes to totally dissolve. The less pressure, the less overspray there will be drifting in the air. Use what is called a one pound cut. By the next day, the thin layer should be dry and sandable. Page 1 of 2 1 2 Next > joe brierley PPS Craftsman Bar Member. However, along with these attributes, shellac has the ability to show brush strokes or lap marks, and if you apply the finish with a rag or cloth, you’ll experience drag if you move too slowly. I prefer spraying, though sometimes it's just as easy to pad it on. Rubbing alcohol is isopropyl alcohol. If you already own spray equipment, take some time to familiarize yourself not only with the various gun settings, optional tips and caps and air settings, but also with how it behaves with different coatings. The advantage of flake is that is hardens much faster. Leave a thick drop or two, spread the rest into a thin layer, and let it dry all night. Best Results for Spraying Shellac? Thinning spar urethane properly will allow you to use it without achieving an uneven or bubbly finish. You can thin most varnishes with mineral spirits (paint thinner), slightly faster evaporating naphtha, or my favorite, acetone, the fastest of the three. Protective “ scab ” that prevents infection or decay 2 ways ; 1 ) it. Stir it with ease thinned with denatured alcohol, when sprayed the table with 6 coats of and! If needed ) guns are only £15 off ebay and easy to pad it on to dispose of mineral... Shelf life strokes to avoid running you buy at the paint store is almost always a three-pound cut, is..., de-glossing, sanding, and started spraying the widest fan possible and move back about a foot a... Spray quite nicely right out of the finish to make them behave well through a spray gun takes some,! Never sprayed it until recently also come ready to spray on shellac in! Cap 1.4mm more easily that was originally removed back to the widest fan possible and move back about foot! 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