Boiling bone will change the characteristics of it. Bone is, in simplest terms, made up of two components. There is the calcium and then there is the matrix of collagen that holds the calcium in place. The cooking really does nothing much to the calcium because it is an element and we are not talking alchemy here -we are not changing calcium into gold. But cooking the collagen part of the bone weakens and softens it. Collagen is the stuff that makes your skin stretchy, makes sinews - ligaments and tendons, fingernails, too.
It's a protein and by cooking, you chemically change it in a direction that cannot be reversed. Kinda like when an eggwhite cooks and becomes white instead of clear.
If want it good and clean you could try maceration. Immerse it in water and keep it lukewarm. The meat will spoil, rot, and eventually come off with just a little effort leaving the bone nice and solid. Or call a few taxidermy places locally and see if anyone has any dermestid beetles you can borrow. Just keep the beetles far from your home, they also eat feathers, glue, leather, and have a special love for destroying trophy mounts.
