ALI INDUSTRIES 4240 9" x 11" Waterproof Sanding Sheets, Black Product Description Our premium waterproof sheets are the ideal choice when wet sanding and finishing by hand are required. The latex backing provide maximum durability while being flexible enough for sanding curved or contoured surfaces. The tough grain helps produce exception finishes in wet sanding applications. We offer a full grit range that will take your project from start to finish. From the Manufacturer Gator Grit 25 Count 9" x 11" 320 Grit Very Fine Waterproof Sandpaper. The 320 grit very fine sandpaper is a waterproof sandpaper allowing you to sand automotive paints, urethane, lacquer, varnish, porcelain, acrylic enamel, metal primer, or clear coats. Sandpaper can also be used to rust stains from porcelain sinks and tubs. Sand with water to resist clogging and result will be an improved finish. To smooth surfaces sand in between coats. If using an orbital sander, the sandpaper can be cut into a 1/2 sheet, 1/3 sheet, or 1/4 sheet to fit the sander. Features 320 grit sheets are best for wet sanding and feathering paint, or use dry to smooth and shape body fillers Made with a premium grain, which offers a higher cut rate and uniform scratch pattern which makes it perfect for achieving fine finishes When sanding wood, 320 grit sheets are best for scuff sanding between clear coats and sealers Use dry during the preparation phase of a project, usually when removing existing finishes, rust and oxidation; it is also key when sanding and shaping body fillers and primer coats Sheets can be cut-to-fit 1/2 sheet, 1/3 sheet, or OE sheet sanders USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.