Have a set of flares I have painted and plan to install in the next week or so. They mount in the existing screw holes the old trim was held on by. The issue is at the top there is no metal left where the trim screws went through. I figure I need to try to strip down and treat the entire well to keep the mounting holes that are still solid from rusting out, but for the top how have any of you handled mounting flares to cover the rust where there is no metal left for them to screw to? Not a welder fwiw.