Cape them or skin them, cut as much meat off and boil. Pick off the meat, etc till it's clean as possible. Then I either wrap the skull in gauze and soak/sit in a foil pan with Peroxide to bleach. Or if I want fast results I use a buffing wheel on my grinders. I hang them like that in my shop. One's deemed for inside house or cabin I do euro mounts instead of the skull cap/plaque route.