The 600-grit paper is wrapped around this 3M rubber squeegee. Jon has found that it’s hard enough to knock down edges yet flexible enough to conform to the contours of the car. Also key to this process is water, lots of water. Jon ads a bit of Ivory dish soap to the water and lets the paper soak for a bit to get soft. The soap helps the paper slide against the paint and Jon has found the Ivory, over other brands, is easier on his hands.