· now that you know what liquid sandpaper is and what it’s used for, we thought we’d give you a step-by-step tutorial detailing how to use liquid sandpaper effectively. · liquid sandpaper is a chemical substitute for hand sanding. Does liquid sandpaper truly replace sanding ? Sometimes called liquid deglosser , it preps the surface by softening the existing finish so it holds a new coat of paint or sealer. An electric sander can make quick time of a large project, like roughing up the surface of your kitchen cabinets before repainting. And helps bond the new finish to prevent it from chipping off easily. While the exact ingredients vary by manufacturer, all liquid sandpaper is essentially a paint stripper. If you are worried about damaging the surface of your project with conventional sandpaper , you can be assured that liquid sandpaper will safely remove the glossy coat on the surface. What is liquid sandpaper ? Using liquid sandpaper / deglosser or sandpaper helps dull any old paint, gloss, or varnish; · this guide walks you through everything to know about liquid sandpaper and how to use it. · however, understanding when to use liquid sandpaper and standard sandpaper is very important. If you can get away with quickly and lightly sand with medium-grit sandpaper (about 150 grit), then do that. Discover the critical differences, limitations, and best use cases for this popular surface deglosser. Preps the area for a new coat of paint or varnish; Liquid sandpaper , commonly known as de - glosser , is a chemical solution that scuffs up the surface of a painted item by removing the glossy sheen.