I parked my 2000 Crownline with a fiberglass hull behind the trees this summer when we moved to West Texas. My son decided a few weeks later that he wanted to do some target shooting with the .22 so proceeded to set some bottles up over the burn barrel. Later I was walking by the boat and discovered 5 holes about the size of the tip of a little finger. At least one is all the way through. Any good ideas how to fix these holes so they look decent?