i'm a senior in high school and i'm taking auto tech 2 next semester, I've been saving up for a couple of months delivering pizza and i'm looking to buy a first generation 240z. i've been looking online every night researching them and i wanted to know what the best way to fix rust on the unibody ie. floor boards, roof ect. just in case i look at a z with some rust. what type of welder should be used and what is the process like. any help would be appreciate. thanks.