Bruce, In order to determine this, a hole should be drilled in your artwork. I realize that would put you in conflict. Knowing what this material is, doesn't compensate for partly destroying the beauty of this work of art. So let's stay it intact and contain our curiosity. Enjoying it, is an excellent compensation for this 'lack of knowledge', Buddy.
Try to change what you think you can't accept, but accept what you can't change. Please CLICK HERE to see my journal! Feel free to save my images or to add them to your favorites.
Bruce, In order to determine this, a hole should be drilled in your artwork. I realize that would put you in conflict. Knowing what this material is, doesn't compensate for partly destroying the beauty of this work of art. So let's stay it intact and contain our curiosity. Enjoying it, is an excellent compensation for this 'lack of knowledge', Buddy.