Looking for advice. I have two task force cabs. One has no rust in floor, corners, pockets etc. Only rust is above windshield inside and out. It runs the majority of the length and is severe. Other cab is good from floor up. Body man suggested swapping the tops. I'm going to visit with another Body shop but wondered about patching that area only, rather than the whole top. I'm sure some of you have repaired this area. How did you do it?