You go for the disc sanding with the maximum coarse grit range. The coarse grits are normally between 40 and 50 grits. Fine sandpaper is available in grits ranging from 120 to 220t. Medium grit sandpaper, ranging from 60 to 100, is suitable for final shaping. Sanding rough wood and removing planning marks from wood is frequently best accomplished using medium-grit sandpaper.