I just bought this 1990 Convertible and I used this issue to assist in negotiating the purchase price, but I have never seen paint like this on an Iroc. It is only on the driver's side door above the molding that runs along the middle of the door, nowhere else on the car. Any insight is appreciated. I plan to get the door repainted but it pains me to do that as the car looks to be all original with only 54k miles.

 

Nice looking convertible! Extra points award for the America Flag in the background too. By the window molding it looks like the clear is peeling away or is it paint? Perhaps the door was repainted at some point? I am no paint and body expert but from what I read it is possible that if the door was repainted the body shop mixed products. Reducer from one manufacture and paint from another. This could cause the finish to check..

 

Thanks for the info and compliment. I am going to take it to my paint guy, hopefully he can tell me, but I do have a friend that worked for GM during the Grand National development and he thought it may have been a faulty factory repair. I'm just looking for some insight since we have some awesome paint/body guys in this forum. Thanks again!

 

To me it looks like mixing incompatible paint products, or applying/blending incompatible paint products one over the other.
in any event, the door needs to be taken down to bare metal and repainted.
Remove everything and do it right......mirror, moulding, ground effect, window sweep, lock cylinder and door handle.

 

Maybe the door was replaced from a car that had a repaint.

 

Likely a repaint. My entire 89 Iroc looked like that when I got it. Body shop said the only way to fix it was to sand to bare metal, epoxy primer, block, and paint which is what I did. If you try to paint over what's there you will see the check marks through the new paint.

 

I had the same cracking going on on my 88 formula drivers door. There ended up being body filler on the whole door. Sanded it out and rebuilt it back up for the respray.