Frame rust
Tell me about it. One spot weld at a time, over and over and over and over and over and over...
I haven't been counting, but by the time I finish replacing all the panels, rails and structure that my Challenger needs replaced I'll probably be in the thousands for spot welds cut and replaced. I know I'm well into the hundreds already, with the floor sections, rear frame rails, firewall sections, etc. And I still have full quarters, the roof structure and probably a front rail to do still.