It's quite wonderful. I dissolve the paraloid B-72 in acetone (1 part B-72, 8 parts acetone), then soak the bone in the acetone for about an hour, let the bones dry, and then suddenly they're solid and strong. You can adjust how much acetone you use for how thin/thick you want the fluid. Bones are porus so I opted for a thinner solution and it worked great. It was also really cheap.
Links to obsure but interesting Wikipedia articles are some of my favorite HN posts.
How many museum curators who need non-yellowing flexible thermoplastic are there on here?