Sand out ridges left by a nicked planer knife with 120-grit sandpaper. Sand with the grain. Wrap the sandpaper around a Styrofoam block or use a commercial sanding block as shown here.
How to Use a Bench-Top Planer Use a power planer to smooth rough lumber, clean up sawn edges and reclaim used boards.
How to Use a Power Planer They shave and shape wood like a hand plane, a belt sander and a jointer all rolled into one.
How To Use a Circular Saw To Make Long Cuts Learn how to safely saw boards freehand, cut plywood with a straightedge guide and build a ripping jig for accurate cutting with a circular saw.