jessica...Auto correct is just great init
Most exotic metals are welded in DC such as Titanium, stainless, inconel etc so your covered with those. It's really only aluminium and magnesium you need AC for.I'm looking at dc only as its cheap enough to earn itself back and more. Then I will probably eventually by an acdc. I do little exotic metal if I'm honest so its not a major concern.
Cheers for the words of advice. Top bunch.