I just wanted to chime in on this subject since I just purchased a Leia PF from another board member and the dress had the dreaded stains. Knowing the PF was coming, I went to Target and spent 3.99$ on a stick of Tide to go on the advice of Deckard. I got the statue tonight, used the Tide stick and the stains disappeared almost on contact. I used the solution all over the dress and there was no visible residue or stains left on the dress from the tide stick, I even used a flashlight to really get a good look at the affected areas. Thank you Decard for the suggestion, Thank you MeguiarsEM for the awesome price, and thank you Tide!
I still want to say that you should do this at your own risk! please don't come back and blame me if it doesn't work for you. lol