I'm glad to say I finished the giant glowing skull! It took me a few months to cover the foam skull first with thinset and mesh and then after a few layers of that hardened shell I slowly covered every inch of it with glow in the dark tile (and some standard stained glass and glass tile in the parts that didn't need to glow). This is going to be my big ticket item at the upcoming GLOW SHOW, a blacklight and glow in the dark themed art show that I'm participating in as well as curating. The show will be at the end of August at the RayRay Gallery in downtown Chico. I'm already learning so much about things that glow under blacklight! More soon!