If you have dirty, dull brass and would like to make them look like new then you need to use FrankFord Arsenal Brass Case Polish (4 oz) It is specifically formulated for the reloading industry to protect your Brass from becoming brittle. It is formulated to be ammonia free and will not leave a residue like other brass polishes. It is formulated to be ammonia free and will not leave a residue like other brass polishes. Add Brass polish to untreated Media, and though Media does not wear out, it may become weaker with use. Adding 1 teaspoon per 1 pound of media will make it clean your brass better. For use with Frankford Case Tumblers or the Frankford Case Tumbler Kit.