Here's the skinny: I'm thinking of touching up the old man's '47 Chevy which still wears its original coat of lacquer paint. While the patina is very nice in spots, there are some small rust holes in the fenders that we'd like to patch and & then spray to touch up without repainting the entire panel. I was thinking of trying out the Duplicolor Paint Shop stuff since its easy and apparently a lacquer-based paint. Other than their PDF saying "Lacquer can be applied over Lacquer", DupliColor doesn't mention much acrylic vs nitrocellulose compatibility. What's the consensus a**** the folks who lay down paint? Is this a good or bad idea? What would accomplish the same thing without messing up the original paint that's on the car? Thanks as always!
My painter refuses to shoot acrylic over nitro.... even over a sealer/primer. I'd be interested in other's experience too.
Hamber Earl Sheib told me about a product called Color Blender, that was used for spotting in repairs. I haven't seen him post here in a while though. It's not a paint, it's a product for blending work. I have no clue about the Acr vs. Nitro.
Generally no it will not work. the chemical make up of acrylic lacquer is different, and will react over nitocellulose lacquer. i found this out the hard way many years ago trying to blend in a couple small areas i had repaired on a customer car.
A blending agent generally softens the exsisting finish so the new paint melts in resulting in a better blend on urethanes. It would be more likley to lift the old paint this way than without. There are adhesion promoters for door jambs and trouble spots that might help keep the new paint from lifting the old though. Mostly when I've spotted in on old lacquer with any success was when I dusted the paint on very slowly so the chemicals from the fresh paint did not transfer.
www.hirschauto.com sells nitrocellulose lacquer. They stock Black and clear and make other colors to order.
Painting over old lacquer can cause serious trouble even if the same material is used. When I did restoration work the painters used acrylic enamel for spot repairs on old lacquer.
Thanks for all the replies everyone. I may snoop around Bill Hirsch's and learn more about his stuff. It sounds like the best way to shoot these panels would just be some acrylic enamel over the original paint. Then? Usual scuff & spray?
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