I've heard of guys making bowls and spinners by rolling metal into a
form that's turning on a lathe. I gather they use some kind of roller
against the metel to force it in as the lathe turns, but beyond that I
don't understand the process. I don't, for instance, understand how
the metal is held in place while being forced into the mold. The
mold, if I'm recalling correctly, was simply a wood block with the
proper depression cut into it.

Perhaps I should ask "Tinman".

Corky Scott