R.T., The wax is called baseplate wax and is used in dental lab procedures. BB sells it for 25 cents per sheet. I use it all the time and swear by it. Once the glue is set and you are ready to turn, I use an Exacto knife or a metal rod to clear out the tube. I have a steel rod that I use as a homemade disassembly tool, and pass it through the blank to pop out both pieces of wax. Early in my learning process, I overheated a pen mill why reaming out poly glue, and glued the blank to the pen mill. Fortunately my Mama wasn't near by with a bar of soap! Anyway, try baseplate wax. Give your dentist a pen, you'll probably score a lifetime supply of wax, not to mention some nifty drills for your Dremel tool.
William