
From the late, great (not dead, just late) John Dorman: Use a small battery powered eraser to create highlights. First, lay down a smooth pencil smudge on the drawing area. Use tissue to smooth it fine. Sketch image lightly on smudge, being extremely careful not to avoid getting graphite all over your hands. Hands should look like a coal-miner's afterward, so people think you are really working hard. Use eraser to create light areas, basically drawing with the eraser. Manual erasers will work but not as good. The above drawing is not an example, just needed to post a broad.