ppg epoxy primer

[durante29]

im new to painting and had ppg recomended to me for use. i have primed some metal parts and the ppg epoxy primer has wrinkled on me. the funny thing is i applied 2 coats with the recommended time in between and the primer has wrinckled in different spots! can any one tell me what im doing wrong? (note: i am painting over existing paint which according to the ppg spec sheets this is acceptable)

[200horse]

what are you putting the ppg epoxy over?

If you are new you might want to try buying primers/clears here www.southernpolyurethanes.com they have the best customer service and tech advice you could ever ask for. I think that is really important when you first start out

[Harry Phinney]

There are two likely causes. It's most likely that the wrinkling/lifting is occurring in paint layers below the epoxy. While epoxy primers are one of the safer materials to apply over existing finishes there's no guaranty that the old paint won't react badly. Most commonly in my (somewhat limited) experience this occurs when the underlying paint is multiple layers with a hardened paint over an unhardened paint and the hardened paint has been sanded very thin. Another less likely problem is that there was some sort of contaminant on the surface in those areas that caused the epoxy itself to react badly. If you carefully dissect the paint in the wrinkled area you can probably determine whether it was the epoxy itself or an underlying paint that suffered the bad reaction.

Harry Phinney