If you will look in behind it. You,ll see what cause it to rust out. No drain holes. Dill about 2-1/2 inch holes in the bottom amd you should noy have any more problems. Looking good.
This is what caused it to rot out (road and water salt), and it'll probably happen again, no matter what.
If and when it gets retired from both, then maybe a full body off (and full 1/4's).
That said, if you are talking about the lower end of support tubes for TG latches, they were partially cut out at the bottom
14 years ago (and no longer attached to that lower 1/4 panel corner), when I just patched up the rust, without cutting
large sections out, like now. I also cut out support for wheel arch completely (when that was fixed), as we all know that's why
they rot out.
Recently, I had front inner plastic wheelwells out and tried lining them up in rear wheelwells, and except for the front area, they
line up surprisingly well with the opening in the rear 3/4th's, even at rear edge of wheelwell and back to lower body transition.
But which is worse, keeping the rear tires from kicking things up in there, or trying to stop that, and then having the junk that
invariably will get in there stuck on top of them, against bodywork?