I purchased a box of stained antique hankies, but the pins holding them onto backing paper had left rust marks all over them. I took a chance on this product-and all stains were removed. I know that sounds too good to be true, but it is. I have used this (it only takes a little bit in a soaking solution)on stains on white pants, damask tablecloths, and pillowcases with the same results. Expensive, but worth it if it works!! Oh, and I sold the hankies for a great profit that more than paid for the product.