As soon as I had it coated, I rinsed the antler under water to remove and neutralize. I dried the antler with paper towel and a blow drier then took fine sand paper to mimic the polished or rubbed areas that looked whiter. Then I gave the antler a light coat of neatsfoot oil to return the slight gloss that antlers seem to have.
Your best bet is not to get whiteners on your antlers but if you do, you can fix them.
Just dont mix this stuff with antifreeze or gylcerine soaps.
for the pyros in the audience. There are other uses for Potassium Permanganate