i agree with using the potassium permanganate. i have used it for quite a while now to color antlers i have used for knife handles. really polishes up nice with a buffing wheel. i have a great 13 pt. set given to me by my bro-in-law that was almost snow white from exposure to the sun. i stained them and mounted the skull on a board and put it up on the wall. he bought the story i made up about the one i shot that got away to be found later. didn't even recognize the antlers as the ones he had given me. i got my pot. perm. from the local drug store. cost a bit, but a little goes a long way. have fun and good hunting!!