Thread: Advise on stains in bone and Ivory

if you really want to get that coloration out, i know that putting a paper towel over the scales and pouring bleach on the towel would work wonders, and would not harm the material. Look up bone bleaching on google (for taxidermy) HOWEVER, I suggest putting something heavy over the whole thing, so that they don't warp. (I don't know if moisture matters on those materials as far as warping