Skinned the skull pretty much right away. Removed as much skin fat as possible, lower jaw and eyes removed. Soaked it for 24 hours in Dawn dish soap and water. Pressure washed the skull and removed more flesh, fat etc. boiled it gently for about 2 or 3 hours in water and Dawn dish soap. Final clean with power washer and various tools to remove the brain and sinus material. Gently boiled again in water and hair dye product that’s mostly peroxide for about an hour. Rinsed it off, coated it in the hair dye product overnight. Next day rinsed and done, pretty close to what this guy did on YouTube. This was my first attempt.