I have wanted to experiment with Tig. I have a miller Bobcat 225+. Can I just purchase an air cooled TIG torch and a bottle of argon and connect it to my welding leads? I know I would not have voltage adjustment capability and I would have to use scratch start because of no HF. I am assuming this would work for mild steel or stainless steel.

Would there be a way to use this set up for aluminum?