I have never seen a Dermestid be attracted to or even want to eat a thoroughly tanned hide that has been glued to a form! I'm not saying that they wouldn't, but in all of my years of taxidermy, I have never had or seen this happen. I did have someone bring me a Boar once ( already mounted ) for repair. There were holes in the cape everywhere. When I removed the cape, it was Dermestids feeding on fat that had not been properly removed. Meat or fat left on the hide will not tan properly! Only a very thoroughly fleshed hide can accept tan properly.