Hello, I have been using vibratory tumblers for years, with different media, sand, walnut shell, corn cob, & plastic pyramids. The first 3 I use for polishing, not a high luster, but easier than hand cleaning, with fair results. I was using the plastic pyramids, dry, a lot of dust & rust residue remained on the metal, even worse if oily or greasy to begin with. I finally gave in to adding Simple Green, full strength, about 2 ounces, to the bowl of plastic pyramids. I am very happy with the rust removal, doesn't remove all of it, and leaves some of the age and character to the metal. The best parts are the shortened cleaning time, and easy cleanup afterwards. I,m not looking for clean and shiny, just trying to remove the scale, and pitting. The photos are before & after, 1 hour run time. Regards, Lou
