From the pics I have seen, It looks like the paint on the bumper (lower) portion has the adhesion problem. Aren't the front and rear lower fascias painted separately by a supplier and attached to the factory painted body?
I was following this thread regarding commonly missing paint from inner area around the headlights and someone suggested that these parts come from outside the factory PAINTED:
http://www.camaro5.com/forums/showth...bumper+missing