Re: holes on floorpan?!
I had the same thing. I went to the hardware store and bought a fiberglass sheet, can of fiberglass and curer(harding solution), sanded off the old rust/paint,cleaned it with rubbing alcohol,let dry. Now put the fiberglass from the can down on something that you can mix the curer with(piece of glass)mix the two together and cover the hole,just enough to cover the hole and about 2-3 inches further out, now quickly put a precut sheet of the fiberglass over the hole and spread it out.Put a coat of the fiberglass liquid that has the curer already added on top of the fiberglass material cover the material completely working from the center out. Wait an hour and if the patch isn't hard you didn't use enough curer. I did this on several holes in the floor and it sealed great. Now lay the carpet down. One more thing, read the instruction on the can of fiberglass it will tell you how much curer to use. I guess you can call this a poor mans welder.((:>))