I looked a PU a few years back that had been completely dismantled-early 40's Ford...anyway, every fender, bed, running board bolt-etc- had been torched off and all the sheet metal in those areas was gone.
I told the guy all he had to do was just heat the nuts red, go all around the truck and then start taking the cooled ones off.
His plan was a "complete restoration".
So saving a hours worth off wreching was going to cost him (well the next guy I guess) 20 hours of repair.
Mercy some folks.