Has anyone tried this, using a battery charger, "washing soda," etc.? I've read about it online and seems like a slick way to go, IF it works. Here's a link as an example. There's a lot more of them "out there."

http://www.instructables.com/id/Electrolytic-Rust-Removal-aka-Magic/

I've got a all metal wind chime that appears to have been made by a blacksmith, my wife picked it up for $2 at a yard sale.

Also, if this works, what to coat it with after, rust oleum? Naval Jelly, followed by ?