2003 Bad Pewter Paint??

[Traveling Fox]

My 2003 Chev 2500HD Duramax/Allison apparently has a coat of bad Pewter color paint on the hood.

 

In a few places, perhaps up to 1" in diameter, the paint initially starts cracking much like a dry pond bed in the summer heat, then the paint flakes off leaving the gray primer underneath.

 

The truck usually is parked outside in Virginia.

 

Anyone have this problem? Comments? Causes?

[PewterC3]

have you had birds dumping on it... and you left it there for a few days?