I found this on the Web so you can try some of these. There are at least two commercial products available in hardware stores for removing rust stains. One is
<http://www.amazon.com/exec/obidos/ASIN/B000BQRBS2/ref=nosim/toiletology10-2 0> Iron Out of Iron Out, Inc., 1515 Dividend Rd., Fort Wayne, IN 46808-1126. I've had very good results on a number of occasions with this. Another is ZUD Cleanser a product of Boyle-Midway Inc., New York, NY 10017 that I have also used successfully. A homemade receipe for a cleanser is to sprinkle "cream of tartar" over the stain then cover the cream of tartar with paper towels. Next saturate the paper towel with hydrogen peroxide and allow it to soak. I found the following in "Formulas, Methods, Tips and Data for Home and Workshop" by Popular Science and Kenneth M. Swezey. <http://www.amazon.com/exec/obidos/ASIN/0060141646/ref=nosim/toiletology10-2 0> <http://www.amazon.com/exec/obidos/ASIN/0060141646/ref=nosim/toiletology10-2 0> Formulas, Methods, tips and data <http://www.amazon.com/exec/obidos/ASIN/0060141646/ref=nosim/toiletology10-2 0> Iron and rust stains that are fresh can usually be wiped off or washed off with household detergent solution. More stubborn fresh stains may be removed with fine pumice powder or mild scouring powder and water. If the stain has gone deeper, sprinkle with sodium hydrosulfite powder (the dye-remover chemical sold with some packaged household dyes), dampen the powder, and leave for not more than half an hour. Follow right away with a solution of sodium citrate. Repeat the sequence, if necessary. Finally, wash with water and dry. This treatment works by changing colored insoluble salts into colorless soluble ones that can be washed away. It may, however, dull polished surfaces somewhat, possibly necessitating repolishing. [Non-text portions of this message have been removed]
