Turbo Brite Brass Polish - 5 oz. Brighten the finish on your brass or add to untreated Corncob media Turbo Brite Brass Polish is ideal for use as an additive when using untreated Corncob or Nutshell. Also works with treated media to bring brass to a high luster shine. Description: 5 ounce bottle Brighten the finish on your brass or add to untreated Corncob media Add to untreated corncob or nutshell media Works with treated media to bring brass to a high luster shine