Bob's Component Resto, Part 27: Sheetmetal Rust Repair

I hate to rain on your parade, but you do realize there is only one proper way to fix rust, right? Cut out the rust, weld in new metal and then filler, primer and paint. Although you CAN fix a rust hole by cutting ALL the rust out and then doing a fiberglass patch, fiberglass is not metal. And the repairs on the three places that "merely needed a bit of body filler as they were not rusted through" are likely temporary at best. I see the before pictures of those three spots, and you can't properly fix rust bubble areas like that with a bit of filler. Rusty / bubbled places like that need to be cut clear back into good metal. If you keep the car for a while, you will see those three places come back.
Sorry.