It’s good to have multiple power sanding discs that vary in grittiness. For courser textures for the early rounds of sanding, sanding discs in the 40 to 50-grit range are best. As you progress towards smoother detailing, the 60 to 100-grit range is where you’ll want to be. Some fine sandpapers can range from 120 to 220-grit but are not typically used with power sanders.
What is the strongest grit for power sanding?
60 to 80-grit sandpaper is a great for power sanding when taking off significant strips of wood or rounding off tough corners. There are some extra-coarse sandpapers that are extremely strong for tackling thick layers of dense wood, with some power sanding sheets going as low as 24-grit.