rust repair around back window

hi oldfart . no pics yet but will take sum soon! but its around the bottom corners on back window and a spot halfway . oh ya its 67 cuda notchback . i think that dam vinyl roof is why it didi it! but theres like three spots that have to be cutout because u can poke right trough but tey aren't that big like biggest spot to get back to good sheet meatl would be like 2.5 inchs square.