Hey, A buddy of mine's young son was patching some rusted areas on the fender of an old Chevy and was wanting to show off some new found metal working skills, but was having some problems- He said " I cut out the rusty metal, and cut some patches of metal from a fender I got from a body shop scrap pile, but somethin' ain't cool! The patches I cut from the new fender are hard to form and don't weld too good." I asked, "what was the fender off of you cut the patches from?" He said he didn't know, but was probably something Asian, given that's what the body shop worked on from where he sourced the fender. I said "It sounds to me like you gota hold of some HSLA!" Some WHAT?"' he said. "HSLA, high strength -low alloy -steel" I said. For over thirty years now automobile builders have been using this to improve crash strength in vehicles, but also to save weight! Less weight = better gas mileage. Floor panels, wheel houses, firewalls, top panels, rockers, doors, quarters and fenders all can have HSLA in them. HSLA cannot be welded well ,with a gas torch (which is what the young lad was trying to do) and some alloys will only form with heavy force from a press. I suggested he cut out the patches, and replace them with some CR 1020 (cold rolled carbon steel) he could source from a hardware store. Clean, cheap, formable and most weldable witha torch. No funny alloys to contend with. Scrap metal from older vehicles, like 35+ year old would probably be o.k., but the late model material can spell trouble! Swankey Devils C.C. "Your head would look good on a pike"