Is the 3M Scotchgard Marine Liquid Wax the best marine wax on the market? Well, it comes highly recommended by a number of our customers. 3M Scotchgard Marine liquid wax is formulated to provide an exceptionally high gloss with durability that lasts. Use on fibreglass/gelcoat, marine topside paints, painted aluminium and marine metal parts. Formula uses reactive chemistry which actually bonds to your boat's surface to provide lasting protection.