I took it out of the self-cleaning oven, (thanks Katie H and Aunt Bea!), it got a bunch of stuff off, but it ain't as purty as when I first got it. Still working the wire brush. I think I'll take Pac's advice and concentrate on the grill. Will smear it with bacon fat and put in the oven to reseason. The rest, I will try Dee's idea of using cheap cola soak in a box lined with a garbage bag when I get around to it, or Sir Loin's auto shop beadblasting. Some salt and oil on the nooks and crannies per Tim. Hope I didn't forget anyone!
It takes a village to derust a hibachi! Thanks all!
She who dies with the most toys, wins.