Hello! I am restoring a 1970 Ford Bronco. I’ve been sandblasting the body and replacing panels where needed. However, i am noticing some rust showing at the seams where panels/brackets meet. I can blast most of it away, but I fear that more rust between the panels may eventually deteriorate the spot welds themeselves. The panels themselves are still in very good condition. The way I see it, I have two options: 1. remove as much rust as possible and seal both sides of the seam or, 2. remove the panels, sand the rust, prime the ends and reweld the panels. How is this issue normally addressed? Thanks!