Hydrachem Hotspot Black Stove Polish 170gram Tin. This water-based polish contains graphite that covers minor scratches and rust, leaving a lustrous black finish. It is also available in a 75ml tube. Please note that the tin design and logo may have changed slightly. This product is a matt black water-based polish. After drying, it can be polished to a rich dull black. Stove and Grate Polish will not smear or rub off on hands when dry. Apply sparingly.