I saw a site where someone was fashioning body panels out of scrap metal from junk cars to install where rust had been ground out of a car body. This makes sense to me as the thickness of the junk car would be about right. It would be cheaper (FREE!) and more available than buying sheet metal of the right gauge from a supply house. But...what about bending a flat piece to fit the curve of the GT body? Does it need to be slip rolled first or can it be bent into place as it is tack welded into the prepared hole? Anybody ever used a trunk lid to make a fender patch? I´m tempted to try it but would like to know if there are pitfalls that can be avoided first.