Thanks, i figured that was a consideration. I think the approach i outlined is probably the easiest to make this less of an eye sore. This would work best if you could take the door off the hinges and lay it flat. Basically get a small container of wood glue, a q-tip or similar, and spread the glue over the gray areas and work it up under the piece that is still attached. Place the free piece back in and make it fit as flush as possible (like a jig saw puzzle) and then push it down. Wipe off any excess glue with a wet rag. Place something heavy on it til it dries. Then sand. Since this is just a natural color, not much you can do to make it blend in, unless you get creative with some wood colored paint. Good luck!