I just found out about this product - Evapo-Rust.
http://www.orisonmarketing.com/corrosion/evaporust/evapo-rust.htmlFrom the web site: "EVAPO-RUSTTM is non-corrosive to steel and does not harm brass, copper, aluminum, gold, lead, titanium, steel, cast iron, chrome solder points, vinyl, plastic, rubber, silicone, glass, cork, or wood. EVAPO-RUSTTM has an indefinite shelf life* and can be used over and over until it absolutely stops working. On average, one gallon de-rusts up to 300 pounds of light to moderately rusted steel."
At $21 a gallon, it sounds promising. Anyone tried it?