So rust repair has begun!
Rear left corner fixed:
random hole in rear right wheel well fixed
Random hole at bracket for rear right seatbelt spool fixed
I didnt realize till later that these were terrible pics. Ill try to get better ones and replace them later on.
That concludes the 'easy' repairs. Now for the bad ones:
I suspect these will take a bit more time to fix, so probably no updates til theyre done. Hopefully thats all of it; there is one spot near the driver seatbelt spool i need to inspect, but thats the only other spot in question as the front half of the floor is in great shape.