View Full Version : Urethane clear coat over lacquer paint? Weather, dirt and other damaging elements never … So Which One ? General Discussion. Lacquer over Urethane on Site A builder gets advice for using a shellac inter-coat to isolate a lacquer top coat from already-applied urethane. He estimated acrylic enamel paints at about half the price, or between $100 and $130 per gallon, though he said he hasn't bought an entire gallon of acrylic enamel in a long time. urethane over lacquer. But the spar was applied over oil, primarily. It will bubble or peel eventually. But the lacquer over poly could have more immediate bad consequences as the solvents in the lacquer attack the varnish. Epoxy coatings darkened in four to six months. Aaron, the simple truth is spraying urethane clear over a factory lacquer paint job is a crap shoot. Urethane lacquers lasted about one year under the same conditions. Live Q&A - Can Enamel Paint be applied over lacquer paint? They are made of solid oak facings with the sides oak veneered plywood. Can he sand the lacquer and put a spar urethane over it without clouding the … Varnish over Lacquer? I just finished the body work on my 46 Hudson Pickup truck. I've done a lot of Harley tins with Harley paint that is lacquer then top coated with urethane clear and never had any problems. If it's not, shoot it with another coat of clear urethane. Durability may be what you are looking for over vintage correctness. I tape off my stripe as … Wonder why it's so smooth? A quick guide to wood finishes - what to use, and when to use them. (Oh…I waxed the boards too.) The clear coat of urethane supplies the acrylic enamel paint with a buffer between the paint and the elements. Thanks Randy Baked alkyd-butyl and butyl coatings looked good after two years of open exterior exposure. If you cut thru or cut it very thin the strong lacquer thinner could get thru and possibly lift the urethane. 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? I've worked with GM factory lacquers that were as resilient as factory baked enamel and other factory GM lacquer that would lift immediately if a thinner or aggresive reducer came anywhere near it. Question I'm a contractor with various guys coming and going over the span of this 4 year custom house we're building. No, you don't want lacquer over urethane. . Manufacturers make polyurethane from synthetic resins … Just as you can over any Drying Oil. You didn't say if the urethane is clear. This should make sense, because once dried, the oil has cured to a hard solid film surface, and stuff will now stick to it. Painting Urethane over Lacquer primer. Identifying the finish on wood floors or furniture is necessary if you plan to strip and refinish the wood surface. A nitrocellulose lacquer failed in less than one year of open exterior exposure. I understand that Polyurethane or Urethane clearcoats are more durable - harder and gasoline resistant than lacquer. now this was bulk acrylic lacquer that I sprayed on, then spayed 2-3 coats of clear lacquer. On a vintage recreation or restoration I want lacquer. Is there anything special I have to do to spray Urethane over a lacquer primer. When a car is painted with acrylic enamel, a clear coat is applied over the paint. Here is a comparison of these two products so that you will be able to make a fully informed decision as to which of the two to use on your next wood project. They are both relatively easy to apply and clean up. As with all primers, proper surface preparation and weather conditions must be … Automotive paint resins are usually one of the following three chemical compounds: lacquer, enamel, or urethane. Correspondingly, can I put urethane over lacquer? There would be no problem spraying lacquer over the urethane, no problem what so ever. No real reason to use lacquer primer anyway. Second, polyurethane is not the best choice for painting over lacquer finishes. PeaceKeeper. I have it primed in red oxide lacquer prime, the I have selected is a PPG Urethane. The rattlecan finish was easy and cheap, but I would like something tuff. I’ve used spar urethane for years on cornhole boards I’ve made from cherry, curly maple, walnut…even a few exotics, padauk, lacewood zebrawood. Never paint any urethane over lacquer primer. Its 2013 avoid lacquer if possible and use a urethane single stage or urathane base coat clear coat you will have a more durabale stable end product. Though urethane paint is very durable, the surface to which it is applied largely determines which primer to use. First, whatever finish that is applied will never look as good as the one put on at the factory. Urethane has many advantages. "At $250, I can buy urethane paints for that price," Jim said. When I use urethane, I keep it as thin as possible. It's more flexible, arguably equal to or better gloss, and excellent UV protection when cleared. In short; you CAN apply a lacquer or a polyurethane over a Danish oil. General Discussion. You also must factor in that the EPA has been the driving force in automotive paints as much as anyone over the past 15-20 years. The lacquer you get today is not the lacquer you sprayed 20-15 or even 5 years ago. Polyurethane will not bond or grip well with the lacquer and will peel off over time with general use. The HD color match paint is lacquer, yes, 1970s locquer. The drying process is much slower than urethane paints and leaving a coat to sit for 24 to 48 hours before applying another coat is recommended. ... you'll have to spray a solvent-based clear over an Auto-Air basecoat. (Lacquer thinner often has ethanol as a dilutant.) The high lead content in lacquer has led to lower lacquer production, which in turn led to higher demand among a small set of restorers. Polyurethane and lacquer are two of the most popular finishes for wood. It is all a matter of what you are looking for in your guitar. I just looked at a tank and fenders I did about 12 years ago and I was even amazed, they looked perfect. Lacquer clear sucks in the sun but lacquer paint can be wetsanded and buffed to a mirroe finish rather quickly, then cleared over … Either way, when done right you can hardly tell a difference in the two. And it works great…a few of the original cherry boards are over 10 years old. This is especially true with enamel and urethane paints used over a lacquer-based paint or primer, since they are totally incompatible. Click to see full answer. It's applied via a sprayer, because it is thinner than the other finishes. However, for specialty applications like marine or automotive, there are additional considerations. Post a reply. Even if you don't use any other primer and are applying new paint over existing paint, it's important that you use a sealing primer to separate the two coatings. Lacquer provides the extremely intense gloss finish often used on many Asian-inspired or ultramodern furnishings. October 28, 2008. Is it possible to spray a 2 part clearcoat (Poly/Urethane) over the acrylic lacquer, perhaps using some intermediate layer between them so there's no reaction. That is why the light sanding or scuffing with 600 is all that is needed. 2k Urethane over lacquer. The key to success is to make sure the oil has fully dried first. 02-03-2010, 06:22 PM. Be sure to follow me on Instagram https://www.instagram.com/caraddictgarage/ for quick updates. It's not compatible. Make yourself at home...read, ask and answer ... could have been from a spray can we or the o/p has no idea. Because acrylic paint is lighter than urethane, careful consideration should also be used when selecting a primer. Make yourself at home...read, ask and answer! Urethane over lacquer? If you only scuff and shoot the lacquer, there isn't a darn thing that can happen. I painted my GTX with lacquer and a clear enamel over it in the 80s it lasted about 10 years and then started to look shabby. 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. Can you paint urethane over enamel primer? Lacquer finishes have been used for centuries to give woodworking projects a tough, durable and water-resistant clear finish. This means that you might be facing frequent maintenance, but it should be relatively easy to touch up . Instead, use an alkyd v wildone | Posted in Finishing on January 29, 2002 12:48pm * We have a bookcase combination consiting of four units with a clear lacquer finish. Greg Williams: The best I’ve used is … If the urethane clear is cured and isn't scratched or sanded thin you can shoot lacquer over it without any worry of lifting. One thing about painting stripes, Always try and pull the tape while the paint is still wet, it'll give you a better edge. The other general class of oils are Non Drying Oils. They could attack the shellac as well if that was used as an intermediate. For me its simple. Unlike polyurethane, where you must sand the surface in order to apply a new coat, lacquer is generally thin enough that a new coat can be sprayed over the surface without the need for this. Painting a car makes it look new again. If you want to learn how to paint your own car, this is the place! Paint products adhere by chemical or mechanical bond, or sometimes both. No degradation at all in the finish. Never put lacquer over urethane, Lacquer is a rock hard brittle paint and urethane is a flexible paint. It's a different material and will very likely peel in a few years or less. This is why it is best not to mix and match systems or … Why? Today's lacquers are available in both spray and brush-on styles, but both have the advantage of being among the fastest drying of all woodworking finishes.Brushing a lacquer finish requires a little more time and effort, but is probably a little bit cleaner than spraying. It is extremely durable and resistant to damage; however, over time it can begin to discolor and become scratched. Unfortunately, lacquer is also known to peel and discolor over time. Acrylic lacquer paints can be costlier than acrylic enamels. Polyurethane is a highly durable finishing material that comes in high-gloss, gloss or matte finishes. 2k primer should go over lacquer primer with NO problems. It's common to do custom paint in lacquer and coat with urethane, just not the other way around. MillenniumRemodeling | Posted in Construction Techniques on January 27, 2003 07:48am My buddy stained a bookcase, then brushed on a lacquer; hates the result. The #1 site on the Internet to discuss and learn about autobody and paint. Just don't cut thru the urethane, that would be the only issue. I have also painted lacquer with a urethane clear. However, there are distinct advantages to using each. Fenders I did about 12 years ago and I was even amazed, they looked perfect use! Wood surface spraying lacquer over urethane well if that was used as an intermediate resistant to damage however! To isolate a lacquer top coat from already-applied urethane primer to use rattlecan... Tell a difference in the lacquer attack the shellac as well if that was as! Easy and cheap, but it should be relatively easy to apply and clean up contractor with guys. Acrylic enamel paint be urethane over lacquer over oil, primarily a flexible paint make the. 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