Beetles:
Beetles are their own monster, and aren't for the seasonal skuller, but they are recommended by professionals. For someone in it for the long haul, they are awesome because they do a lot of work for you, and are very effective. They require consistent temps, humidity, and food. And they stink. Parasites can destroy your colony. That said, there are many great resources online or at taxidermy.net if you look for them.

Here is a neat article about a skull cleaning class/business using beetles at Wind River High School in Wyoming.

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