help! i bought this second hand really cool green t-shirt but it has a white stain on it (!) i think it's probably paint and has probably been there for a while - i bought some stain removal stuff (can't remember the name right now) and smeared it over the stain and then put it in the washing machine as per the instruction - anyhow it's still there :( so can somebody give me advice on how to remove this very stubborn stain - i want to wear my new fab t-shirt !!!