What are the 3 grades of sandpaper?

Coarse grits are typically in the 40- to 50-grit range. Medium sandpaper, ranging from 60- to 100-grit, accommodates some final shaping. Primary sanding of rough wood and the removal of planning marks on wood is often best done with medium-grit sandpaper. Fine sandpapers range from 120- to 220-grit.

What is 3M sandpaper used for?

Long used for a wide range of industrial applications, our 3M™ Sandpaper delivers toughness and flexibility for auto body repair projects large and small. This combination of materials makes hand or machine sanding of auto body surfaces faster, easier and more cost-effective.

What is 3M Wetordry?

3M™ Wetordry™ Sandpaper in finer grits features silicon carbide — a synthetic mineral that is very sharp and commonly used for low-pressure applications such as paint prep, smoothing of clear coats and as an alternative to compounding.

What do the different grades of sandpaper mean?

Sandpaper grades are numbered. The lower the number the more coarse or rough the sandpaper is and the higher the number is how fine the sandpaper will be. There are lots of different types of sandpaper starting at 30 grit which is classed at extra coarse going all the way to 800,000 grit which is nano fine.

What type of sandpaper is used in 3m body repair system?

3M provides a durable, effective sandpaper for each stage of our 3M™ Body Repair System. Aluminum oxide is popular because of its fast cut-rate and long life. This natural mineral makes a tough, durable abrasive that self-fractures during use to expose fresh cutting edges where traditional abrasives can quickly wear down.

What grit sandpaper should I use?

Sandpaper grits are categorized by how coarse the abrasive material is. You will ideally start with a coarser abrasive and use progressively finer ones to achieve a smooth result. The most common grits are 60-80 (extremely coarse), 100-150 (medium grit), 180-220 (fine), and 320 (ultra-fine).