I see that you have a lot of suggestions.....just thought I would throw this one into the pot. I remember using Dreft Laundry detergent for my kids clothes when they were little. It is formulated to be used for infants clothing and it was the only product I ever found that would remove those nasty formula stains. (not to mention the other types of stains babies make) This is the stuff I would use if I had a stained but fragile antique item to wash. Good luck and please let us know what works the best.