I must have been lucky with some of that rust traps. Both my delta brackets were shot and the n/s/r bumper bracket rusted away. But under the rear arches were ok for me, phew
The thing that made my heart sink was all the studs that hold up the exhaust heat shield and the some of the plastic fuel lines. Its the same studs that are used to hold on the plastic wheel arch protectors too. I was lucky in the wheel arches but some of the studs are half the size they once were.
My advice would be to remove the plastic nuts on them and give the stud a good blob of grease while you still can
The only thing I could find that fit the bill to replace the stud things was to modify some roofing bolts and weld them into the patches
