Hi
Can I suggest an even older method of removing surface rust from Steel and Iron that is still in use today by Museum conservators, because it is a little slower to act not too harsh and of course it works reasonably well though more importantly does not leave things worse than when you started .
You use light oil like sewing machine oil or three in one as a lubricant and the edge of coconut shell to rub the rust with. Acid type of rust removers can play havoc with blue finishes and acts as stripper for rust blues.
