You can get a good paint adhesion with proper preparation. All aluminium cans have the neck rolled to reduce diameter to fit the crown after printing, and the outer and inner coatings survive this with no problems.
plasma cutter. I don't work here. I was given these photos from a contact I had for years at Eagle. I do work in lighting. LED in all applications and metalworking. So I am familiar. A friend and fellow collector makes to-spec reproduction visors.
Nice clean production area that you keep.
I like the LED lights for some applications, but there are areas where they are not good, although there are improvements all the time.