could try rubbing alcohol...works on latex...If it is a natural material like wool or cotton...lacquer thinner...sparingly...just dab with a cotton ball, get it to break down with a hard edge...you still may have to wash it a few times....I used to take my painters clothes to a commercial laundry...80 cents a pound took 80% of the paint out (Hmmm...wonder what 100 cents would do) I think they used a lye soak...can't be specific about how to do that except that it's caustic and thus dangerous.
