Try this....I’ve done with skulls to make a nicer finished look. Elmers glue watered down slightly to make it flow easily. Brush it all over the skull. Repeat 2-3 times. It fills in the cracks and voids. Adds a little rigidity to everything. Gives the skull a slight shine and protects the skull from discoloration When you clean it. Great job on the bear hunt and the finished product.