1 x Hotspot Black Stove Grate Polish Tin 170g Hotspot Stove Grate Polish has a water-based formula and is suitable for wood/coal stoves, grates and surrounds. It is particularly useful for covering rust spots and minor blemishes. After drying, it can be polished to a rich, dull black. Stove Grate Polish will not smear or rub off onto hands once it is dry. Apply sparingly.