Maybe a dumb question: How is it that some shooters get their brass to so high a polish that you can see yourself reflected in their rounds? I've been using a Lyman turbo tumbler with corn cob media and a dab of Dillon Rapid Polish. My brass comes out clean and shiny but nothing like some other folks' brass. Do different brands of brass polish up better than others? Are there better methods or materials? Just curious. ???