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Tue Jul 20, 2004 11:45 am

I sprayed my single cab a metalic green with some old Acme Enamal, on top of a lacqure primer-surfacer. It was uncatalized. About 2 weeks afterwards, the paint on the roof wrinkled. Only the roof, the rest of the green looks fine. It starts about 6" above the drip rail, so it's not the whole roof. If it was the whole thing, I'd think it was some sort of reaction in the paint, or between the different products, but what caused just the roof to wrinkle? Thanks.

-Jeff

Tue Jul 20, 2004 12:22 pm

something on the body there before you shot it. usually some type of chemical. Could be the prepsol if you used it, I had the same thing happen on just one spot on my hood three times then finally just sanded it all the way back out and reshot it.

Tue Jul 20, 2004 7:32 pm

sounds like the 2 products you used reacted and didnt take. That is very common with laquer type products.

Wed Jul 21, 2004 9:52 am

SuperSkim wrote: sounds like the 2 products you used reacted and didnt take. That is very common with laquer type products.

Yep, enamel over laquer = bad mojo :( :shock:

Thu Jul 22, 2004 11:03 am

It's lacqure over enamal that can cause major lifting. lacqure primer-surfacers are still fairly standard practice for those doing stuff at home or on a budget. The roof was treated the exact same way as the rest of the truck. If it was a chemical reaction with the products I put on, why did it take 2-3 weeks for it to appear? Thanks.

-Jeff

Thu Jul 22, 2004 3:39 pm

Bugman Jeff wrote: It's lacqure over enamal that can cause major lifting. lacqure primer-surfacers are still fairly standard practice for those doing stuff at home or on a budget. The roof was treated the exact same way as the rest of the truck. If it was a chemical reaction with the products I put on, why did it take 2-3 weeks for it to appear? Thanks.

-Jeff

Sorry Jeff I read the post and diddn't catch that it was laquer primer, thought you had shot over some older laquer finish :oops:

I still have seen some bad reactions over laquer primer. How long had the primer been down before you sprayed it.

Was the roof exposed to any moisture or excess heat after the top coat was applied?

Fri Jul 23, 2004 4:37 pm

Keifernet-
No moisture, at least not any more than the rest of the truck. It was hot and sunny for awhile though, and since it lives outside, it's always in the sun. Think the heat could have caused it?

-Jeff

Fri Jul 23, 2004 4:51 pm

Bugman Jeff wrote: Keifernet-
No moisture, at least not any more than the rest of the truck. It was hot and sunny for awhile though, and since it lives outside, it's always in the sun. Think the heat could have caused it?

-Jeff

It might have caused some VOC's in the laquer to "lift" and I think that may have been it. But I can't say for sure except what we already know... some kind of reaction took place under the top coat.

That's why I was asking how long the primer had been down/dry.
if it was on for a few days then it should have had plenty of time to flash off, so it still is a mystery.