Looks like you got more than enough answers. I agree with you, take a piece of yours and daughters wedding dress material and try washing it, by hand. I can't remember what Martha Pullen uses on the antique dresses and such that she has purchased from all over the world, but she says it has lifted yellow and stains. Maybe if you look at her website you will find an answer. I love what you are going to do and wish you lots of luck, but no matter what it will be something full of love!!! Martha's Sewing Room.