Paint crazing

[espo]

I recently had a paint problem that I had never experience before. I'm redoing a pick up kit that I had started, then put away, and now changing the direction of the build. I had painted the interior with Model Master enamel over Tamiya  white primer. After some light sanding and other interior changes I sprayed with Tamiya white primer. The seat and the interior tub both showed crazing after the paint dried. The dash that had been painted in the exact same manor at the same time did not craze. It's all sitting in the purple pond now, but wondered if anyone else has had this happen.  

[MrObsessive]

Sounds like you put the Tamiya primer over the enamel without first stripping it, and that's a big no-no. Lacquers don't play nice laying over enamel, where the reverse can be no problem with enamel over lacquer. 

Why it didn't happen to the dash, I don't know.  It's best to strip everything as you're doing and try it again. I'd let the primer dry for a couple days to be on the safe side before painting over it. I take it that you spray bombed the paint? If so, go easy with very light coats to prevent the solvents from penetrating too deep in the paint.

Hope this helps! 

[espo]

Sounds like you put the Tamiya primer over the enamel without first stripping it, and that's a big no-no. Lacquers don't play nice laying over enamel, where the reverse can be no problem with enamel over lacquer. 

Why it didn't happen to the dash, I don't know.  It's best to strip everything as you're doing and try it again. I'd let the primer dry for a couple days to be on the safe side before painting over it. I take it that you spray bombed the paint? If so, go easy with very light coats to prevent the solvents from penetrating too deep in the paint.

Hope this helps! 

Thanks Bill., this is just what I have done. Everything stripped back to the original Tamiya primer overnight. I went ahead and did the dash also since I  wanted to detail the gages in the dash I was using.  This was something I had just not had happen before so it just  surprised me when it happened.