After a while of carving and scraping the clay out I am happy to say that the mold appears to of gone well. Only a couple of small air bubbles have appeared, and a slight cast, but they do not seem to be to much trouble and are thing is I might be able to fix later. The first tricky part of cleaning out the clay was the part of the board the head was stuck to and removing it, as it was very Imbedded into the clay and mold. I had a little help removing it by using wooden sticks that would be wacked around the wooden peace to help shimmy it out. After some effort I was able to get it out, and then the next tricky part was cleaning out the mold with on wooden tools and picks. Since anything else like metal tools could damage the mold. But all went well and I’m very pleased