Mike, when you use Nu-Finish, do you just pour it into the media and let it tumble for a while before throwing in the brass? I use an additive (can't remember the name, I just call it Shiny Juice) that is used like that but it is more liquid than Nu-Finish. Nu-Finish is a bit thicker, but still lighter than 95% of other car polishes. Seems like it would mix well.