Cool. I worked in a job shop for a few years in this farming community.. When I moved here it was the only job I could find I could tolerate locally. I thought I knew how to weld when I started, and truthfully welding steel is welding steel. But I learned a lot about welding different kinds of cast iron and got very good at it. Tractor blocks, car engine blocks, "dried out cast" like exhaust manifolds that some dummy either used JB Weld or a Nirod on. Malleable cast, etc. I knew when to use a raw cast rod, when to use brass and when to use a Nirod. Some of these poor farmers would about crap their pants when I told them a pulley off a combine would have to cool slowly overnight in the lime box and if they took it right now it would probably crack again.
Eventually they came to know my work was good.
I was fairly good at layout work, fabbing stuff customers wanted. Of course when you're on the clock, customers don't understand that every minute gets charged while they take an hour to try to explain what they want and start scribbling on paper to try and show what they need. Worse yet are the ones that hovered over your shoulder critiquing your work and insisting on telling you how to read a rule, run a lathe, drill holes, etc.
I built a lot of driveshafts as well and did "light" machine work on the lathes...I would never call myself a machinist.
My biggest challenge with cast were some large bearing mounts that had been welded many times, and yet broke over and over. I had an older friend that worked in the steel mills up north who gave me some instruction: butter in a nirod, stainless, and a 7018 rod in consecutive passes. Well I did so and the stuff never broke again.
The pay was abysmal but I enjoyed the work overall, if not the owners who knew jack about welding unless it was with a MIG gun. TIG? Forget it they had no patience for it.