What is the best way to remove the factory under coating from a fender?
I am doing this at home,(can not make to much of a mess) I do not have acess to a sandblaster. My body guy said not to use a torch or I will run the risk of warping the fender.

Father of
1969 Dart Custom, 318 4bbl, 904, 8 1/4 rear soon to be a 340
1967 Barracuda, 273 Commando, 4bbl, 904, 7 1/4 rear Project car