Actually a lot of the commericial aluminum pots are spun. Also they are thinner at the lower part of the pot and will tear if you don't use a step bit or spade drill.
How Aluminum Is Manufactured For Your Needs.
Aluminum cookware has been manufactured using a variety of processes. Stamped aluminum cookware (think camping kits and dollar stores) doesn't hold up to heavy daily use, but it's fine to boil water in - think how much of your daily cooking consists mostly of boiling water - and a good lightweight choice for camping.
Commercial spun aluminum cookware, made by deforming heavy sheet aluminum on a spinning lathe, is widely used for commercial cookware, and you'll see it hanging in restaurant kitchens and bakeries.
Cast aluminum cookware, often called club cookware, is thicker and harder than spun aluminum. You can still find a beautiful and functional old Cookware teakettle or roaster; and Magnalite cookware, is available both used and new.
It would be rare to find a pot that was machined in a lathe (machined as in turning and boring that would leave machine marks.)