Latex paint doesn't crack??
I was a pro painter, I just painted my garage door last fall after
alot of great scraping over old cracked paint and its cracked again
today. I used sherwin williams best paint. My original coats are shot,
I should have stripped the doors.
Plywood? Warped? Painted inside and out? If it has panels, the wood
probably sucks up
moisture and expands more.