Rust holes near rear window - Best way to fix?

[djmatio]

Hello,

1972 super, rust holes on either side of the rear window near the window, down near the bottom half. These were painted over when I purchased the car, but my finger poked through one day to my surprise. The total size of the rust spot must be 3" in diameter (mostly still covered with paint and super rusty), and are on either side. Trouble is that they are too far up on the pillar that I cannot access them from under the hood. There is a metal panel blocking access.

These are the only rust spots I have. Can someone suggest a way to fix them? Welding? Bond-o? etc. The location of these holes makes it difficult because you cannot get at the back of the panel. If you would like a picture I can take one.

thanks,

Matt