I know I'm going to sound like an idiot, but I noticed shiny spots on the black strips on the roof when I picked up my car in August. I tried everything and they will not come off. Just wondering if they are expensive toi replace and how are they to take off and re-install. The last thing i want is the dealer who apparently sprayed the car with some foreign object to do the job. I'm sure i would leave with a few scratches. Thanks for the replies!