Free: Contests & Raffles.
Last time I did one in the bathtub, I forgot about the cleaning lady was coming over. She got quite the surprise when she went in to clean the bathroom!I just coated 3 "test" skulls and wrapped them in seran wrap out in the garage. We'll see how it goes. About 24 hour's and then brush it off right?
I've added some Brown bottle peroxide 3% to my degreaser for a few hours, worked awesome but be careful it can be very harsh on the bone if you let it soak to long, bone may flake. I would practice on a skull or two to find what works best for you.