That was going to be my assumption. Something happening when the top is down. Mine had a small spot also, but I have fixed it and it hasn't returned.Hi, Where is the reoccuring chip located on the top. Mine was about 3 inches in about 2 feet back from the front. After two repaints the dealer found that one of the screws from the trunk assembly was hitting the top while the top was retracted.
Good luck
JIM
Cubby558:cool