Update...
All the COS hoops, (13, 14, 16) have been cleaned and polished. It was a laborious process, due to rust on all hoops. First, I had to clean all the hoops with my solution of Dawn and rubbing off the rust with aluminum foil. All the hoops were towel dried, followed by an application of Mother's Chrome Polish and hand buffing. While not showroom condition, they are clean and shiny. I didn't take pictures this time!
Also, all the Memriloc hardware, plus the Swivomatic floor tom brackets, have also been cleaned and polished. Removing rust from the textured satin finish of the Memriloc tubes proved tough, but I found ways to deal with this. While not perfect, every part looks so much better than the condition they were in when I brought the kit home!
-Mark