GMC van roof.
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I’m pretty sure this it’s factory paint and it looks like the paint just never stuck.
Should I prep and paint like normal? Or do something more for adhesion?
Plan is to strip the paint. DA the whole thing with 180. Epoxy. Color. Clear.I have seen this many times. Chances are the epoxy primer was baked too long at the factory and the recoat window expired before it was top coated. Poor adhesion.
I would strip to bear metal and start over like you described and you will be fine.
We had to repair hundreds of GM vehicles at the dealership that had this delamination problem.
Quickest way to remove it was with a stripper in a spray can called Peeler.
Just strip the delaminating paint and sand the gray primer underneath-no need to remove all of the gray, just feather out the areas needed and continue as you had already planned…epoxy,color,clear. You probably don’t have to use something as aggressive as 180, unless you have a lot of white that will not blade off.
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