And for those in Britain:

Shield Technology - Guarding Against Corrosion

Claims to remove ONLY rust and also "cleans and brightens" brass and nickel plating.

Anyone up for a "consumer report"?

Found an ad for the stuff in the Britishicon "Woodworker and Woodturner" magazine. ( Good Woodworking Magazine and The Woodworker Magazine )

Now to find similar in the antipodes.................