boil in water and baking soda.. .. Make sure to put the teeth back in ASAP...once the skull starts to dry it shrinks and you will not be able to get the teeth back in. Glue them if you want but the skull shrinkage will keep them in.. Only use a little super glue when you do glue them.

Boiling alone will not whiten the skull...Never bleach Use peroxide to whiten.. Once completely dry, get a can of clear coating and spray the skull.. This will keep the skull from yellowing.