Does anyone know how to get dye transferred from another fabric out of a lighter one? I have 4m of gorgeous sage green cotton that I can't use to make shirts out of because there's dark green splotches on it. The pieces I'm cutting are HUGE...the sleeves are roughly 1m wide on their own. The fabric has been washed, dried and ironed, so I figure the stains are set, but any suggestions would be helpful.