As promised in my earlier post here are a couple of images of the candle cup Gerry Marlow 'spun' as part of his demo.
The first image shows the two formers fitted to the lathe and the flat piece of aluminium wedged between them. The first thing Gerry did was to true up the circumference, then used a polished, round tipped bar to work the metal over the formers. Sorry about the quality of the picture but I take them from the back of the hall, and photograph the projected image, not the actual workpiece. Hopefully it shows how they are spun.
The second image shows a close up of the formers and a finished cup.