As we know brass tubes are fingerprint magnets, and stop being shiny pretty fast. My new Poldiac Uma has gone that way, so I'm thinking of getting something to polish it back up like new, and maybe lacquer it so it stays nice and shiny. Anyone found a good brass polish? I have tried Brasso in the past, but it takes a lot of work over a long time for that stuff to work, so I'm looking for something better.