I took a 6 month basic class, and got a lot of on the job training.
I think the material Nissan used on the frames was whack, it's almost like they took 5 sheets of 20guage sheet and forged them together. I have never seen steel flake apart like philo dough (baklava) until now
It's weird, my 88 spent most of it's life in Cleveland which uses a lot more salt (get a lot more snow) than we do here (Columbus), but my 93 which has lived here is worse. The 88 has had a repair in the very back, but the rest of the frame is still solid. The body on the 88 was bad, but the frame is good. It's just odd.