The near side wing (fender) on my 1992 Jaguar XJS was bubbling near the sill. A poke with a screwdriver revealed hidden holes. The rest of the wing was still in excellent condition, so I decided to have a go at repairing this section rather than replace the whole wing.
I unbolted the lower section of the wing so that it could be pulled away from the sill, then marked the section that would be removed.