QuickSilver Cowl Finishing Compound 859023K1 - Fine - Boat Fine grit rubbing Compound to Remove minor scratches in engine cowls. Provides a high Gloss finish. To best protect the cowl after polishing, Use a high quality wax and buff to a bright shine. 8.4 ounce bottle. Produced by Mercury marine to our stringent original equipment Manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or mercruiser stern drive