Funny you should ask right now! A local dealer just stopped by and told me he was taking a Gunsmithing course from;
http://www.pennfoster.edu/gunsmith/index.html .
This is the old ICS group from Scranton.
He speaks very highly of it. His primary income is from a vehicle repair business he owns, and is the sole employee of. So he already has some very good mechanical skills as well as a lathe and mill. I don’t know if you can select your own curriculum as you can with AGA, or if you need to take the whole thing.
Steve