zz wrote:
i am currently just about ready to spray clear coats on a guitar body
project...i have used a hi gloss oil based enamel for solid
colour and want to spray polyurethane clear coats over it for
durability.....i tried it on a piece of scrap and found that the solid
coat wrinkled when i put on the polyurethane clear coat....why would
that happen??

Because spray urethanes often (always?) have solvent(s) in them other
than plain old thinner and those can attack other finishes.

Another possibility: if the color coats were pretty thick and not really
dry they could have acted like "wrinkle paint"...after putting on the
poly and it dried the color paint continued drying and in so doing
shrunk causing the wrinkles. I'm betting on the solvent theory
though...
______________________

the last thing i need right now is for the same thing to happen on the
guitar body after putting so much work into it....

It would. You might try another scrap just misting on a *very* light
coat of urethane and letting it dry as a barrier. Or using another
barrier...maybe brush on poly?

--
dadiOH
____________________________

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