Hi all, This is a simple metal spinning question that I was asked to bring here. (I know nothing about metal spinning.)

I'd like to make some little radiation shields for use at 77K (liquid nitrogen)
So cylindrical type cups.. maybe 2" diameter and 3-4" long. I've only heard about spinning aluminum, but can you also spin other metals something like TeCu (tellurium copper)

Does the spinning work harden the metal?
Can it be annealed afterword?
How thin a wall/ bottom can you make?

George H.