Images are representative. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Which is more durable lacquer … Finish over water based acrylic paint. You can shellac over paint and lacquer over shellac. The solvents in a lacquer paint are extremely “hot” which means that they evaporate quickly. but they also may be reduced 10 to 20% with water or GF Extender. Deep clean with TSP before using water-based over oil-based paint. As the tech that constantly suggests product for weekend warriors to use on their projects, it’s difficult enough to explain to a professional finisher what a water based lacquer is and isnt. Owing to this, a fine finish requires three-coat and should be done after every 24 hours, additionally when using the water-based lacquer, use water as a lubricant when sanding, water helps produce a smoother finish. Brush water-based paint in a thin coat with a synthetic bristle brush; natural bristle brushes absorb water and become limp. While painting Lacquer over Enamel Paint can be quite complicated painting Enamel over Lacquer is surprisingly easy. If it is cold enough to wear a sweater it is too cold to apply a water-based finish. Lacquer would not be my first choice. Lacquer can cause the paint to bubble or crack due to the very hot solvent that is a part of lacquer. Sand the furniture. Apply all coats of water-based lacquer with the air sprayer adjusted to a pressure of 50 psi. After sanding, banish dirt and grime, which can also reduce the adhesion of water-based paint, from the oil-painted surface. Sand this first coat down to a smooth base on which to build your finish coats. Flatten and degloss an old finish with a palm sander and 120- to 150-grit sandpaper, scraping off loose paint with a paint scraper as you work. The surface of the wood must also be warm. The primer improves paint adhesion and saves paint by sealing bare wood and providing a monochromatic undercoat. Recommended Spray Tips for Wood Stains and Top Coats. Hose Adapter. Check your fluid settings and adjust the controls to get comfortable with the spray angles and to develop your technique. Check with your supplier, then test well. Overlap each pass 25% to conceal lines. Clean the furniture with a solution of strong detergent and hot water. SPRAYING WATER BASED DYE STAINS: Keep your gun at a 90* angle, 6-8" from the surface. We use cookies to give you the best online experience. You can do this with any abrasive, including sandpaper, steel wool or Scotch-Brite. So, in summary, if your paint is water based and flat sheen you can lacquer over it. Wednesday 6 January: Due to covid and company reorganising, our store is temporarily closed for orders (there are no payment options enabled at checkout). I needed to just put a clear water-based polyurethane over the paint. Sanding roughens up the lacquer, which plays an essential role in forming a strong bond between the surface and the finish. When you spray lacquer over a solvent-based acrylic finish, they combine to form a hybrid film, even if the acrylic is pigmented to form a paint. © Copyright 2020 Hearst Communications, Inc. Overlap each pass of stain 50% for even coverage. This is called orange peel, caused by spraying in temperatures that are too cool. © 2006-2020 Euro Finishes. Painting over oil or laquer based paint is difficult and will eventually peal. Also lacquer is very forgiving in that when I spray with my hvlp after I sand I just blow it off. Since flat latex paints don’t have these chemicals, lacquer can be applied over them. From the original questioner: Thanks for all the help guys and the quick responses as well. Acrylic is a water based product so any oil or other water based finish should work. Since lacquer is thinner than the other finishes, it is almost always applied using a sprayer instead of a … When finishing furniture with any product, proper wood preparation is essential. Oil can go over water, water can not go over oil. Clean the furniture of all wax or other contaminants. Testors Lacquer Spray is a durable formula that works on most surfaces including wood, metal and plastic ... Any bonus multiplier is based on the base rate of collecting CT Money. If coverage is … David’s Answer:. The paint sprays you mentione, Which paint sperays better for me? Natural stain can be applied to raw wood to condition the surface for uniform penetration of the stain. Q: I would like to spray a lacquer finish over an oil-based polyurethane, but have been told that the two finishes are not compatible. Sand the first coat lightly with 220-grit sandpaper, then spray a second coat. Spraying too large of an area can result in a textured grainy surface. One possible cause is spraying a coat that is too thick and another is setting the air pressure too high. Therefore, if you are looking to paint over a surface with lacquer as the finish, ensure that you sand the surface before you can go ahead with the application of the pain. Always read safety sheets. Water-based finishes must be applied at temperatures above 18C. The two easiest ways to avoid problems are to spray se Pre-Sealing: Softwoods such as Pine and Aspen absorb stain at an uneven rate and may respond better to staining if the wood has been pre-sealed. You can brush or spray paint, but you must spray lacquer. Lacquer paints dry to a hard shell, leaving a very thin paint film. If the spray paint is water based you can paint over it as it is a porous medium and other painting will adhere. Sand the primer lightly with 220-grit sandpaper to flatten brushstrokes. Try explaining to the customer that bought a $59 sprayer and doesn’t understand why he cant spray … For narrow surfaces, reduce the fan pattern to 2-3" to reduce overspray. Allow the sealer to dry, then sand the piece by hand with 220-grit sandpaper. Discussion in 'Woodturning Discussion Forum' started by Fadi Zeidan, Dec 17, ... clear acrylic spray, or other type of finish over water based acrylic? Poly over lacquer is ok, lacquer over poly won’t work because the thinners are to hot and they will melt the poly. On large flat areas, use wet, even patterns 15 - 20cm wide. 50 Gallons … Sand the bubbles down only after the finish has dried. If you are using a sprayer that has been used for oil based or lacquers, clean the unit thoroughly and rinse with warm water before using. Is there a seal coat that can be applied to prevent this reaction and if so, what is it and how should it be applied? You can tell if a water-based finish is dry if it forms a powder when lightly sanded with a fine-grade (220-320) foam sanding pad or 400-grit sandpaper.If in doubt, wait longer. Test the furniture to determine what type of lacquer finish was used—ordinary lacquer or catalyzed lacquer. Catalyzed lacquer is very hard and durable. Don’t use steel wool if you intend to coat over using a water-based finish. Stewart-MacDonald: Spray Guns - Getting Started, How to Whitewash a Piece of Wood Furniture, How to Paint Vinyl Coated Particle Board Furniture, How to Get the Mirror Look When Refinishing Furniture. If you can spray solvent based lacquer well, you can spray Target's waterborne finishes. It is important to spray enough material to allow proper flow and levelling of the finish. You got it backwards. For example, you may wish to spray Rosewood stain on for a painted look. With water-based finishes, it is better to spray 2 thin coats rather than 1 heavy coat. As a landscape builder, he helped establish two gardening companies. Let the lacquer dry, which may take from one to two hours, depending on the humidity and temperature of the workspace. Spray water on the cardboard to learn how the gun works. Prime the piece by brushing on a coat of water-based wood primer before you paint it. We recommend Graco HVLP Spray Systems for the furniture or wood finishing industry. For narrow surfaces, reduce the fan pattern to 5 - 7cm to reduce overspray. You may or may not consider this an advantage, depending of the type of wood you're finishing. A correctly sprayed finish should appear even and glossy. units. A wet application can cause many paints and finishes to wrinkle or blister, even an old coat of lacquer itself. If you have never sprayed finishes before, take a large piece of cardboard and practice your technique first. Question from a Student: For high traffic areas, does it make any sense in spraying a protective lacquer finish, after applying the Linseed and Tung Oil finish. Repeat as many times as necessary to get a finish that satisfies you. Some water-based finishes bond well over some oil stains depending on the formulations of each. It would be great for me if you could tell me a little bit Please? Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Graco Magnum 257025 – Best Lacquer Airless Paint Sprayer. It is only important, that the Enamel Paint is applied in thin and even layers in order to create a strong and even bond with the underlying Lacquer layer. Water Based top coats are ready to spray from the container. Scratch-Resistant Top Coat for Painted Wood Furniture. Sand bare wood thoroughly with a palm sander and 120-grit sandpaper before you apply water-based lacquer. If necessary in hot or dry climates, reduce 10 to 20% with water or General Finishes Extender to extend the open time. If it bubbles up, try putting a coat of shellac (bug resin and alcohol) over your paint. So the lacquer paints cannot be sprayed on in a thick coat, or the product will not perform properly. You can paint Enamel over Lacquer without any issues. On large flat areas, use wet, even patterns 6 to 8 wide. Break your work into sections such as dresser top or drawer fronts. Contact us to create the perfect color match you need, or for more information about EM6500 water-based custom color lacquer. Paint in even strokes, avoiding drips and runs on vertical surfaces, and don't try to get full coverage with the first coat. There are risks to spraying any type of solvent lacquer over any existing, and older, paint or finish. I need to protect the finish from pealing off with light use. General Finishes water based products can be sprayed through compressed air, HVLP, airless or C.A.S. Powerful. Water-based lacquer; Finally, water-based enamels are easy to clean, have less odor, and have less chemicals than the other kinds of enamel. Any steel shards left behind could rust and cause black spots. Amateur refinishers should not use lacquer! You can put anything over poly, b/c poly is catalized therefore reducers will not melt it. Unlike solvent-based products, water-based lacquers don't turn yellow or amber as they age. It is generally not necessary to reduce Milk Paints. Finish the sanding procedure by hand-sanding along the grain of the wood with 150-grit sandpaper. Last time I used Rust-Oleum water-based matte polyurethane. You can also use a water-based spray/no-wipe stain. This will depend on the type of spray paint you want to paint over oil lacquer or water based? In this instance, do not reduce. You don’t need to clear coat over lacquer. It would need to be removed or treated to accept new layers. With which I can paint my house, furniture and other myself. Sand the first coat of paint by hand with 220-grit sandpaper after it dries to flatten brushstrokes and apply a second thin coat. The safest thing to do is to use dewaxed shellac over the poly and then you can … (Scuffing also helps with the cleaning by physically removing the “dirty” top layer.) Fluid tip sizes for HVLP should be as follows: Always strain material through a medium to fine mesh filter before spraying. Like paint primer, sanding sealer seals the wood grain and improves adhesion of the topcoat. Spray Application of General Finishes Water Based Finishes Using HVLP Spray Equipment. Other, reliable water-based UTC colorants for in-shop tinting include Colortrend® 896 and 802 tinting colorants. Lacquer sprays on in a very thin mil coating. It was … It softens and binds with the undercoat as you build up the finish. The problem is the lacquer thinner in the lacquer. Dupli-Color Auto Lacquer Paint is easy to use and fast drying. If spraying as a paint, do not reduce. There's no "learning curve" to be concerned with. Spray water-based sanding sealer on bare wood with a compressed air spray gun. Any wax or grime on the furniture will interfere with paint adhesion. I’d recommend spraying both the flat latex (thin it 10% with water) … Learn more. Find an inconspicuous spot on the piece and rub it with a cotton tip swab dipped in lacquer … It isn't unusual to clear-coat an acrylic paint finish on a metal surface, such as on an automobile, with CAB-acrylic or acrylic lacquer. Practice makes perfect! This is especially important if you are painting over an old finish. Sand bare wood with the same tools, but finish off by hand-sanding along the grain of the wood with 150-grit paper. If you are talking about spraying lacquer over the polyurethane and the poly is well aged, you might be able to get away with it by spraying light well-thinned coats of the lacquer. yourpaintsprayer.com/spray-gun-for-polyurethane. Some lacquer finishes can be vulnerable to scratches and water damage. Reduction: If spraying the product as a stain in order to allow the grain to show through, reduce 10 to 20% with water or General Finishes Extender. Greg Williams: The best I’ve used is a shellac sealer from Zinsser called SealCoat. Dry Time Between Coats Dry 2+ hours between coats in ideal conditions: 70°F 21°C; 50% humidity. The effect you get is different because of reduced pore definition, but it might work with your objectives. Favourite answer. Water-based lacquer behaves in much the same way as nitrocellulose lacquer, the solvent-based product that has long been the standard in the finishing industry. Be sure to allow adequate dry time. Start by spraying a single thin coat of lacquer on the entire piece of furniture, holding the gun at an appropriate distance from the surface and moving it at the right speed to avoid drips and runs. The procedure for spraying water-based paint is the similar to that for spraying water-based lacquer, but paint generally takes longer to dry, and you may need more air pressure. Pre-sealing will cause the final stain to be lighter. If you're coating an existing finish, hand-sand it with 150-grit sandpaper to etch the surface for better adhesion. Enamel and lacquer are two types of finishes that are commonly used on furniture. Lacquer can cause the paint to bubble or crack due to the very hot solvent that is a part of lacquer. By using our website you agree to our use of cookies in accordance with our cookie policy. It seems that would be the best of both worlds. Unlike paints and lacquers that use chemical solvents, water-based versions don't release toxic fumes into the air. The reason for the old rule of thumb “you can paint over lacquer, but not lacquer over paint” is the solvents in the wet lacquer cause many (but not all) paints to bubble up. Can Water-Based Floor Polyurethane Be Used Over Paint? Hi, The procedure for spraying water-based paint is the similar to that for spraying water-based lacquer, but paint generally takes longer to dry, and you may need more air pressure. Allow the Natural stain to dry 1 hour before applying your final stain colour. Keep your gun at a 90* angle, 15 - 20cm from the surface. Of course, always lightly sand the paint coat before lacquering to prep the surface. Well, I much prefer a true satin or matte finish, but having gone through this before, I knew exactly what I needed to do. Adjust the air pressure to 50 psi. Water-based lacquer may form bubbles. Repeat a third time if necessary. Always test products on a hidden area. Water-based lacquer has a high presence of solids. Spray medium wet films at 3-5 wet ml thickness. Always test your colour on a hidden part of the furniture! Apply a thin coat first that will dry and harden faster. Unlike paint, which is thicker and can absorb moisture in wood causing it to soften over time, lacquer is much more flexible and can adapt to the expanding and contracting of wood surfaces. Cooler temperatures will adversely affect how the finish will level and harden. Note: High humidity can cause the finishes to take longer to dry but will not harm the final finish. Surface Preparation: All surfaces should be clean and free from dirt and oil and sanded as per instructions above. Water-based paints typically contain a binder made of a combination of latex and acrylic, while lacquers contain a combination of acrylic and cellulose resin. View Details Testors Lacquer Spray, 85-g (0) 0.0 out of 5 stars. Hours between coats in ideal conditions: 70°F 21°C ; 50 % for even coverage spots... 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