Again, other threads do a better job detailing the inside turning function of my drum lathe.
Here, I'm starting the first pass.
inside_turn_1.jpg
Working the inside face.
inside_turn_2.jpg
Making the final pass. Finished wall thickness is about 3/8".
inside_turn_3.jpg
Magically, I've executed the process of hand-sanding the inside, up to 150. Oiled up the inside with 2 coats of Waterlox, just to get the job done. The inside of a drum is very rarely seen, so the finish can be utilitarian, and not furniture-quality.
oil_inside_2.jpg