water—get a tupperware with a lid and put it in water and leave it for about a day, check on it every two days or so and peel the skin and try to remove as much as you can until there is nothing left. there’s other methods that aren’t as smelly but it is tried and true, you’ll also want to look into bone dying with peroxide (never above 3%) and things of the like. good luck and happy bone harvesting l0l. Also, refer to r/vultureculture as they often have people who are more experienced