Interesting thing about fiberglass bodied cars do to electrolytic effect all the rust takes place in what ever metal is there. Examples:
Went to wash the 10 years of dirt off the cheap Avanti and tried to roll up the passenger window. Turns out, the frame piece that hold the glass at the bottom was swollen with rust and binding up the works. The P.O. must have tried too because he busted the regulator, and cracked the fiberglass on the inside of the door. I grabbed a good used window and regulator, repaired the fiberglass and put everything back together. Now after four hours of labor, I still need to wash the car.
OK moving on, time to bolt a new starter switch on the inner fender. Again, rust in action. I had to drill out the broken screws and retap.
Next, install parking light sockets, surprise the bulbs are frozen in the sockets. Got them out with some pliers, cleaned out the sockets with a battery brush and then had to drill out the mounting screws. The good news is I now have parking and turn signals. Next, I'll install the headlight buckets, no telling what will happen there.
JP/Marylandr Studebaker On the Net