So I make jewelry out of bone I find while hiking and camping. I just started using deer sheds I've found as well. I cut the antlers into small sections and engrave designs on them, but a lot of the time the color is ugly with black spots at times. I haven't seen Abby post online regarding how to whiten the core of the antler after you have cut it. Any suggestions? Would just like to get the black spots off. Also what's a good sealant to protect the piece while my customer wears/sweats on it? Thanks for your time.