I have little tiny rust spots on my 2001. They appear to be on the surface you can rub them vigorously and they go away. Dealer says it is not covered under warranty(truck has 7 year 50K bumper to bumper) 6 months after I bought the truck they were on the truck. They clayed the truck and rewaxed it and it went away. THey have came back and it looks really bad from about 8 feet away. Any body have any suggestions on this?