I've been trying to partly change the colour of a Lego piece, the cheerleader hairpiece to be exact, but I don't really know how. so far I've tried sharpie but it starts rubbing off after a few days. I want to change the colour of the piece to red, but I want to leave the front/fringe the original colour.
Any techniques would be appreciated, even ones I wouldn't be able to try at this point in time.