Choosing and Using Random-Orbit Sanders

Glide the machine across the surface, working from side to side so you're sure to sand everywhere without dwelling too long anywhere. Norm likes to sand the whole surface across the grain, then diagonal to the grain, then with the grain before changing to a finer grit. Keep the machine moving, but don't press hard or "scrub"—the sander's own weight, plus your gentle steering control, is most efficient and effective.