Hi If it's a handwash only bra squirt a blob of vanish gold rub in gel on it rub in then leave it for a couple of hours then hand wash it in really hot water with persil handwash and a scoop of vanish gold and leave it to soak in it for half an hour and hey presto the stain will be gone  if your washing it by machine then use vanish gold rub in gel as before but you don't need to leave it as long only half an hour then wash it with your usual washing powder and a scoop of vanish gold in the draw . Vanish gold is worth it's weight in gold theres nothing it wont shift .