I've been using SS pins in a tumbler for a few years now to clean black powder cartridges. Usually I use filtered tap water and Dawn withvavfewvdropsbof Lem-Shine. Works ok but brass does not look "like new".....
Yesterday I was looking fir the bottle of Dawn and it was next to the box of Casscaid dishwashing pods. I decided to throw a pod intothe tumbler to see what happened. Amazing results! Absolutely clean...near " like new". I took a bunch of brass that I had "Dawned" a few months ago and cleaned them with the pods a second time. Beautiful results. Am I the first to discover this or am I late to the party.