wrote

The metal in the video looked like stainless. How is
aluminum spun without it galling on the tool? Do they use a roller
instead of the bar?

A lot of spinners use wood for their tools, but this one did look like
metal tools.

It was aluminum, though. Did you notice that he used a can of spray one
time towards the end?

Lubricant such as silicone does help things slide a bit easier, but it is
not necessary.

Rollers are used by machines when they do the turning, since they don't have
the feel for the art, and exactly how much pressure to apply, like a human
has.
--
Jim in NC