Someone on this site suggested I talk with Nick about cleaning a bear skull with dermistid beetles. I did and the results are below. The skull on the right is one I cleaned by boiling and then bleaching the skull -- note the yellowing from fat in the bone. The one on the left was done by Nick (717-567-7460 or cell 717-576-8859 or nerway@pa.net ) near Newport, PA. I think he did a nice job for $40.