bondo is for flaws in sheet metal - lead is for joints, as in the factory leading - they use lead [body solder] there cuz the 'cosmetic' fillers can't stand up to the flex stresses at those points
Buddy - leave the original lead work there - if it's too cracked, redo it w/ lead, if it's just scored up from yer rough paint/rust removal, then smoothing w/ filler will prolly work fine - welding might work, but I'd rather trust the original designers, whose work has already stood the test of time!
Bill
