Greg's Bugs and Bones is a professional skull cleaning/European mount business.
We use the same method of cleaning and preserving your skulls that museums use, i.e. dermestid beetles.
Dermestid beetles are insects native to North America and are found in every continent except Antarctica.
The adults and larvae feed primarily on flesh but can eat through practically anything including: carpeting, wood, cereal and other grains, leather, and taxidermy mounts.
One of the few things they cannot chew through is bone; which is what makes them so useful for skull taxidermy.
Unlike other methods of skull cleaning such as boiling and maceration, dermestid beetles do not cause any shrinkage in the bone at all except for what occurs naturally in the moisture leaving the bone.
Dermestid beetles clean every miniscule crevice in the skull but leave all parts of the bone unharmed such as small nasal or ear bones. This is especially valuable for skulls that are to be cleaned for educational purposes where it is necessary that these small parts of the skull be kept intact.
Dermestids are also virtually the only way of effectively cleaning bird skulls and other delicate skulls that would
otherwise completely fall apart and get destroyed.
Taxidermy.net is an abundant source of information for all things taxidermy.