Yeah, I've never done any metal casting before. I will definitely look into it. And I see what you are saying as well. Aluminum foil is REALLY thin, that is why I was going to try using 3 rolls. And I planned on firing them as rolls as well. Though I really like your ideas of getting car parts, I might have to give it a whirl.
As for my age, I understand that I am young and naive. Though I have a 28 year old brother and a 26 year old brother that have helped me learn the trade for a couple years. I have very much to learn, but I suppose that is why I'm here ;)