Let’s talk about sandpaper. No repair will be without it. Elevator paper is available with grain performance indicators. They come from 12 to 4000. The indicator indicates the number of abrasive particles on an inch paper. The smaller the number, the larger the particles and the rude skin. Enjoy work is done by different works depending on the granularity. Rough sandpaper, which has granularity up to 60, is used to remove old paint, olifa. Middle grain paper can be polished in front of the primer wood, smooth irregularities. Thin grinding is performed with a skin with granularity 150-180.
Scratches, spots are removed with sandpaper with a granularity of 220-240. You can also take a thinner skin. The skin will help to get rid of the smallest scratches, the grain of granularity of which is 360. By the way, fire alarm (APS) is now very popular, many companies install it.
By type of abrasives, paper is divided into four types. The hardest is a ceramic abrasive. It produces primary processing of rough wooden surfaces. The second abrasive is silicon carbide. They process metals, fiberglass, plastic. The third abrasive will be aluminum oxide. They are polished by wood. The softest abrasive is a grenade. It is also used for wooden surfaces, polishing, it makes the surface smooth.