I have searched the threads on spoilers, but none answered my question. Does anyone know the composition ? I have some blistered paint on the leading edge of the spoiler. The two body shops that I have had look at it..all have made a BFD out of it. The blisters are not that bad, in fact they can barely be seen, but i want to arrest & resolve whatever issue this is. The shops have both used the word "rust"..but I`m pretty sure the spoiler is plastic coated aluminum...yes or no ? Any one else have this problem?