Use the Norton SandWet 2,000 Grit Aluminum Oxide Waterproof Sandpaper and its strong resin bond for wet applications. The JIS-graded ultra-fine silicon carbide abrasive and durable B-weight waterproof latex paper backing means you get the finish you expect from a fine grit, with resistance to curling due to humid conditions. The paper works well on finishing metal projects, wood, fiberglass, and composites.