I turned the wood round and hollowed out the inside as Rob indicated. Then I made a jam chuck from some junk wood and turned a section to match the inside taper such that it would just fit without moving. Next I put the wood onto the jam chuck and held it in place with the tail stock. I turned the outside taper and sanded it except for the tip section so that it was still held by the tail stock. I wrapped masking tape around the wood to hold it to the jam chuck. The photo only shows a small piece of tape to show you how it is supposed to fit. Then I parted the tip section off and finished turning/sanding the tip. This is a similar technique for finishing the bottom of a bowl.
