hey Billius something that might help to prevent those chips in the future is a product from 3m. It is a clear bra that is used on high end cars for the same reason to prevent rock chips. Here in idaho some of the window tinting companies install the stuff you might check in to it after you repair your fenders, then you wont have to worry about rock chips at all, oh and you can do the underside of the boat too hope this helps