If you have some old Goldberg metal reels that have seen better days and have much scabbed-off paint and maybe some rust too, I've found that Rust-Oleum's "leather brown gloss" spray enamel will make them look like new again. It's a near-perfect match for Goldberg's brown enamel finish, only a little shinier; and because it's Rust-Oleum, it should help prevent further rust. (Provided you've cleaned the reels and scraped off any existing rust as best you can.)
I found this paint very reasonably priced at Kmart, but it's no doubt available at your favorite hardware or department store.
(PS: Remove film from reel before painting...)