Technical What paint/primer base would cause epoxy to wrinkle?

I have sprayed multiple panels on my olds with epoxy with no issues but for some reason on one of the doors the epoxy wrinkled. Just curious what kind of paint or primers arent compatible with epoxy?

 

sometimes to wet
it can BURN in and wrinkle back at cha

 

Epoxy will not wrinkle if activated correctly, with full cure. Did you spray the door separate from other panels? How long ago was it sprayed? 1k or 2k epoxy? Did it wrinkle in the edges or the entire panel wrinkle?

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It is 2k epoxy, it looks like it wrinkled where a couple spots were feather edged in, but it didnt wrinkle on all the feather edges.

It wrinkled 20 mins after spraying. The door was sprayed a couple months after after the other panels.

 

SOMEtimes ya can skuff and dry spray a LITTLE , with LONGER dry times BETWEEN coats
-n- then, lay down a WET coat, -n- it MIGHT NOT re-lift(wrinkle)...

 

So is it feather edged epoxy directly on top of metal, or is the feather edged epoxy on top of an older existing finish?
Sounds like the solvent in your topcoat soften the old Paint finish. If there was old Paint underneath, its that little bit of exposed old paint that wrinkled and not really the epoxy, now if the car was completely stripped to bare metal then epoxy was applied and it wrinkled but the epoxy has been on the car for a while, I would say it was under activated, but epoxy still would be very hard to wrinkle, unless you just hammered the topcoat on and the topcoat had some very hot solvent. But as long as the car sounds like it sat, even under activated, it still had time to grab any activator in the film to cure completely. My money says you sprayed epoxy over the older finish, broke through the epoxy, then when you sprayed your topcoat, the solvents got under the old finish making it wrinkle.

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THIS...

 

The last paint job the car had looks like it was stripped of its factory laquer, a layer of high build, base and clear was put back on. Its these layers i feathered and sprayed the epoxy over. I havent topcoated.

 

i had the same problem on some door jams. the old paint is the problem. i had to strip the jams down to bare metal to get it to stop

 

Ok, it is the solvent in the epoxy that is attacking the old finish. You can do what was mentioned before, do a light coat or do at a higher air pressure with gun further away, so more solvents evaporate during transfer of spray gun to substrate.

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