"The Device" is made from a piece of 8-32 threaded rod with the threads ground off about half of it, a couple of 8-32 nuts, and a bit of stiff wire(may have been welding rod) bent as pictured....
... and assembled....
... and placed in the chuck of handy cordless drill.
Grubby post placed on device.
Soft towel with a couple drops of Novus 2 followed by a few sprays of Novus 1. Spin the post in the Novus mixture for a few seconds, then on a dry spot of the towel.
Digital picture unfortunately does not properly show how beautiful clean and shiny the finished posts are. Drat.
<Your mileage may vary.>