1974 Dart Swinger VS. The Evils Of Rust!

If it were my car I would grind more of the rust off using 36 grit and a 6" or 4" pad on a da sander. Otherwise I guess you could por15 it and then fill the pits with filler.Top coat it with a coat of that liquid bondo spray (sorry cant remember the name),it's really a very thick hi build primer.