Never paint any urethane over lacquer primer. Lacquer provides the extremely intense gloss finish often used on many Asian-inspired or ultramodern furnishings. Manufacturers make polyurethane from synthetic resins … October 28, 2008. It's applied via a sprayer, because it is thinner than the other finishes. 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. ... you'll have to spray a solvent-based clear over an Auto-Air basecoat. Unfortunately, lacquer is also known to peel and discolor over time. 2k primer should go over lacquer primer with NO problems. They are made of solid oak facings with the sides oak veneered plywood. This should make sense, because once dried, the oil has cured to a hard solid film surface, and stuff will now stick to it. wildone | Posted in Finishing on January 29, 2002 12:48pm * We have a bookcase combination consiting of four units with a clear lacquer finish. It's a different material and will very likely peel in a few years or less. 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. I tape off my stripe as … Painting a car makes it look new again. 02-03-2010, 06:22 PM. Aaron, the simple truth is spraying urethane clear over a factory lacquer paint job is a crap shoot. Urethane has many advantages. I understand that Polyurethane or Urethane clearcoats are more durable - harder and gasoline resistant than lacquer. The other general class of oils are Non Drying Oils. Identifying the finish on wood floors or furniture is necessary if you plan to strip and refinish the wood surface. When I use urethane, I keep it as thin as possible. 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. Baked alkyd-butyl and butyl coatings looked good after two years of open exterior exposure. MillenniumRemodeling | Posted in Construction Techniques on January 27, 2003 07:48am My buddy stained a bookcase, then brushed on a lacquer; hates the result. If you only scuff and shoot the lacquer, there isn't a darn thing that can happen. Durability may be what you are looking for over vintage correctness. Question I'm a contractor with various guys coming and going over the span of this 4 year custom house we're building. Urethane lacquers lasted about one year under the same conditions. The key to success is to make sure the oil has fully dried first. If it's not, shoot it with another coat of clear urethane. 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. PeaceKeeper. Make yourself at home...read, ask and answer! A quick guide to wood finishes - what to use, and when to use them. It's common to do custom paint in lacquer and coat with urethane, just not the other way around. Lacquer finishes have been used for centuries to give woodworking projects a tough, durable and water-resistant clear finish. Click to see full answer. So Which One ? Paint products adhere by chemical or mechanical bond, or sometimes both. 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. No, you don't want lacquer over urethane. Either way, when done right you can hardly tell a difference in the two. Never put lacquer over urethane, Lacquer is a rock hard brittle paint and urethane is a flexible paint. Post a reply. now this was bulk acrylic lacquer that I sprayed on, then spayed 2-3 coats of clear lacquer. It is extremely durable and resistant to damage; however, over time it can begin to discolor and become scratched. However, for specialty applications like marine or automotive, there are additional considerations. 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. The HD color match paint is lacquer, yes, 1970s locquer. As with all primers, proper surface preparation and weather conditions must be … (Oh…I waxed the boards too.) Automotive paint resins are usually one of the following three chemical compounds: lacquer, enamel, or urethane. If the urethane clear is cured and isn't scratched or sanded thin you can shoot lacquer over it without any worry of lifting. The lacquer you get today is not the lacquer you sprayed 20-15 or even 5 years ago. 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. I just finished the body work on my 46 Hudson Pickup truck. Can he sand the lacquer and put a spar urethane over it without clouding the … 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. For me its simple. 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. Correspondingly, can I put urethane over lacquer? No real reason to use lacquer primer anyway. It is all a matter of what you are looking for in your guitar. When a car is painted with acrylic enamel, a clear coat is applied over the paint. urethane over lacquer. Live Q&A - Can Enamel Paint be applied over lacquer paint? (Lacquer thinner often has ethanol as a dilutant.) The #1 site on the Internet to discuss and learn about autobody and paint. 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. On a vintage recreation or restoration I want lacquer. 2k Urethane over lacquer. 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. Acrylic lacquer paints can be costlier than acrylic enamels. Thanks Randy That is why the light sanding or scuffing with 600 is all that is needed. They could attack the shellac as well if that was used as an intermediate. 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. Polyurethane is a highly durable finishing material that comes in high-gloss, gloss or matte finishes. Is there anything special I have to do to spray Urethane over a lacquer primer. View Full Version : Urethane clear coat over lacquer paint? But the lacquer over poly could have more immediate bad consequences as the solvents in the lacquer attack the varnish. The clear coat of urethane supplies the acrylic enamel paint with a buffer between the paint and the elements. It's not compatible. Second, polyurethane is not the best choice for painting over lacquer finishes. 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. Urethane over lacquer? Wonder why it's so smooth? Epoxy coatings darkened in four to six months. Why? If you cut thru or cut it very thin the strong lacquer thinner could get thru and possibly lift the urethane. This is why it is best not to mix and match systems or … Because acrylic paint is lighter than urethane, careful consideration should also be used when selecting a primer. Varnish over Lacquer? I just looked at a tank and fenders I did about 12 years ago and I was even amazed, they looked perfect. There would be no problem spraying lacquer over the urethane, no problem what so ever. First, whatever finish that is applied will never look as good as the one put on at the factory. The rattlecan finish was easy and cheap, but I would like something tuff. It's more flexible, arguably equal to or better gloss, and excellent UV protection when cleared. Make yourself at home...read, ask and answer ... could have been from a spray can we or the o/p has no idea. Greg Williams: The best I’ve used is … It will bubble or peel eventually. Can you paint urethane over enamel primer? Lacquer clear sucks in the sun but lacquer paint can be wetsanded and buffed to a mirroe finish rather quickly, then cleared over … I have also painted lacquer with a urethane clear. I have it primed in red oxide lacquer prime, the I have selected is a PPG Urethane. They are both relatively easy to apply and clean up. Just don't cut thru the urethane, that would be the only issue. 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. Just as you can over any Drying Oil. 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? . Instead, use an alkyd v This is especially true with enamel and urethane paints used over a lacquer-based paint or primer, since they are totally incompatible. General Discussion. "At $250, I can buy urethane paints for that price," Jim said. Be sure to follow me on Instagram https://www.instagram.com/caraddictgarage/ for quick updates. You didn't say if the urethane is clear. A nitrocellulose lacquer failed in less than one year of open exterior exposure. If you want to learn how to paint your own car, this is the place! But the spar was applied over oil, primarily. 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. Though urethane paint is very durable, the surface to which it is applied largely determines which primer to use. In short; you CAN apply a lacquer or a polyurethane over a Danish oil. Painting Urethane over Lacquer primer. Polyurethane will not bond or grip well with the lacquer and will peel off over time with general use. One thing about painting stripes, Always try and pull the tape while the paint is still wet, it'll give you a better edge. No degradation at all in the finish. 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