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Old 08-04-2006, 11:59 AM
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How Long Does Lacquer Paint Last

I found some NOS cans of Lac paint in the color I need. My question is, is there any issue if the paint has been sitting for a period of years.

Also, can I paint lac over the existing factory paint, which I believe is some kind of enamel. It is a 67 Mustang.

What is the appropriate prep steps?

Is there an issue with wet sanding lac metallic paint w/o clear?

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Old 08-04-2006, 12:06 PM
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well, some of the laquer on my '51 Chevy was still shining with gloss, was probably decent in the 80's, so I'd say about 30 years at least. Be careful with nitrocellulose laquer, it is no longer made and there are no products to support it anymore, also, it has lead in it. Acrylic laquer is redially available and legal to spray in NY.
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Old 08-04-2006, 12:15 PM
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I think with lacquer, as long as it's not dried up,
is probably good to use. It'll last a long long time.
Lacquer melts back into itself with thinner, I bet
you could take lacquer dust and mix it with thinner
and spray it again (LOL). Some say no matter how many
coats you spray, it's still one thick coat overall.
It disolves so fast you can't keep them totally apart.
So if you can thin it and not have clumps or solids
still in it I"d think it to be good.
I'm sure one of the paint pro's will correct me if I'm wrong.
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Old 08-04-2006, 12:31 PM
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I agree with JC, if it mixes up and thins out Ok you'll be fine. Watch yourself shooting it over any enamel or any 2K product. A factory enamel can be painted over with lacquer usually with no problem. Use it if you want but durability really isn't very good and if you don't have enough material to do the whole job there might be problems getting more.
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Old 08-04-2006, 04:10 PM
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lacquers can not be used over uncatalyzed enamels. You can apply urethanes and enamels (like if you wanted to clear coat over it for uv protection) over lacquer, but it is generally not reccomended. Your lacquer would be the weak link compared to catalyzed products. I believe that some basecoats use to be lacquer based. Lacquer needs compounding to bring out a good gloss finish. Unless you clear over it with a enamel, urethane or polyurethane clear. But if yo u are like me, you normally end up buffing out your clear, so not saving any of that work by clearing it. But might be wise if that lacquer is a metallic at all which would be disturbed in the wetsanding buffing process. Or you could just say, hey lacquer is outdated and not as good as todays material and just start with catalyzed products which will not require the upkeep and protection lacquer would to last.
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