After de-rusting your parts with the Green Rust Cutting Media, use Dri-ShineIII media to bring up a brilliant luster. Dry Shine brings out the color of the metal and produces a matt to highly reflective finish. A corn cob base is precisely ground, then treated with a proprietary polishing compound for excellent results and much less residue than similar compound-treated walnut shell medias. Product density is 30lbs per square foot.