Help! Looking for expert advice to recondition my air cleaner.

MOPAR faithful: I'm trying to recondition the air cleaner on my 1974 Duster slant six motor. It's rusty, cruddy, and the paint is coming off. Anyone know of a process that'll remove paint AND rust, while at the same time leaving the factory metal coating on the air cleaner? This coating looks like it was galvanized, but it was't of course. I don't want to bead blast it as this would take off the factory anti - rust coating. Any ideas? Maybe take it to a place that can dip it in a solution that removes paint and rust, but leaves the metal coating. Ideas?