I'd look in your local yellow pages, Craig's List, or what have you to find someone who does sand blasting. It might be a PITA to get it there and back, and it might cost some dough, but the results are really good, and it's ready for paint.
Another option is chemical stripping -- When I lived in Maryland, Home Depot sold Aircraft Remover (or Aircraft Stripper, got CRS bad). Works like a champ. Slather it on thick-ish (not gloppy, but not like paint, either) then pat a garbage bag over it & let it sit overnight. The paint should scrape off with a stiff plastic putty knife.
Then hand-sand with 180 on a soft block till it's not shiny.
No matter what you do, wash it all down ASAP with some kind of phosphor pre-treat.