Wasn't sure where else to put this. I am doing a 'restomod' (restoration/modification) on an old Ford. Contacted the Eastwood company with this question, and was referred to the manufacturer. I was surprised that they couldn't answer (Eastwood). My question; at what year did the use of HSLA steel come to be used in automotive bodies? I am wanting to use body lead/solder on this old Ford, but am having issues with tinning the steel and getting the lead to stay where I put it (it tends to 'ball up' instead of staying put). Apparently, these new steels can't be used with lead. Any old-school bodymen out there?