Anyone into electrolytic rust removal?
Cheap, easy, fun!
electrolytic rust removal - Google Search
Been doing this for years, sometimes with rusty old junk just for the fun of returning an encrusted item back to something recognizable.....never done a chain though.
A couple of tips- use the hottest water you can (I have an "indoor grille" element I use to pre heat the bath).
Even though I have stuck my hands in the solution many times, do NOT do it...I got lit up but good a couple of times.