u need a special tool for rolling the fenders. the search doesnt work i'd find u some info. try www.google.com
type it in there
you could do it yourself but u would need that tool. basically they take off the rear wheels off and bolt that tool into the wheel holes, push it against the fender and roll the inner edge up. and gives u just enough room so it doesnt scratch anymore.
but it doesnt push your fender out or anything. it just rolls up the inner edge that sticking towards the tire.
try looking at some performance shop down there where you are. the dealer will not have that thing for sure.