Actually floors are pretty amazing, but the bad spots are right where the L part of metal comes down from where the seat belts bolt too and the body mount. Not sure how to patch it without removing the rear fiber and the body mount??
you could always cut that section of fiberglass away , do the patch work , and then re glass it ? I don't know what your experience with fiberglass is , but that seems like it would be the easiest to me
TREKKER PARTS 86 "shop truck" lots of fiber parts . 84 2WD "hotrod" widebody 1GZ V12 83 Trekker custom , S/C 3.4L 82 Limited Edition MIRAGE # plated 001 of 500 83 limited Edition MOJAVE # plated 465 of 500