Ugh! Don't get me started on GM's white paint from the '90s and early 2000s. My understanding from someone on another forum who worked in a GM assembly plant in that era was that the problem was more with the primer than with the paint. The supplier apparently changed the formulation of the primer and advised GM to allow extra drying time before applying the paint. Of course, GM, in its infinite wisdom, ignored that advice and painted the cars prematurely, leading to adhesion problems later on.
About ten years ago, I got a white '95 Pontiac Bonneville that had paint peeling off the quarter panels, doors and trunk lid but was otherwise in great shape. Oddly enough the largest horizontal surfaces, the hood and roof, were good. It gave me a nice excuse to practice my sanding and rattle can painting skills on the doors and quarter panels and I made them look okay, at least from about 50 feet away, but the rear deck lid was a lost cause. There was more primer showing than paint. But one day I was at a junk yard, harvesting parts for it and while I was pulling a power antenna off of a '92 Bonneville with near perfect paint, I got the bright idea to buy the deck lid and put it on my car. It was the best $27 I ever spent on that car. I repeated that move a couple of months ago with my friend's 2001 Pontiac Montana minivan it became an opportunity to teach her 10-year-old daughter how to use a socket wrench. She had quite the sense of accomplishment when we finished the project.