I have two rust spots on the pillar between the door and windshield. They are rusted through so they are like little holes and about the size of a penny. I have this starting on the suface of the other pillar too. Well, I was wondering what would be the best way to fix this to stop the rust from going further. What to fill the small holes with, sand, then paint? Thanks

 

Just take it to a bodyshop. It wont be that much just to do the pillar. No guarranties on rust work though- Its like cancer