Just an FYI but I recently repainted the roof of my 1997 F150 supercab. The truck is pacific green and the paint on the roof cracked, peeled, and eventualy rusted in one spot. I'm starting to see similar cracks around the the winshield washer nozzles on the hood too.

The truck is always outdoors so I shouldnt be so surprised I guess. The body guy said that he'd seen it before and thinks it happens because the paint was baked too aggressively at the plant?