Flesh-eating dermestid beetles can clean a duck skull in a matter of days. Many museums and nature centers keep a colony or two of the insects, and a modest contribution—say, $25—can often earn you a spot in their beetle box. You'll first need to skin the upper legs and cut away most of the muscle, and skin the skull and cut out the tongue, but the bugs will do the rest. Another option: Ask a local taxidermist if you and your buddies can toss a few duck skulls and leg bones in with a load of deer skulls being prepped for European mounts. Tell the taxidermist there's no need to go through the degreasing process. You will do that yourself in the next step.