3m Brand wet or dry 7 sheet sand paper pack in grades #400, #600, #800, #1000, #1200, #1500 and #2000. Wet sanding is the key to acheiving a professional level finish. Soak the paper for an hour or so and keep the paper wet when sanding by dipping the paper in a cup of water. After sanding to #2000 in grade steps polish to a glass like final finish. One pack will last and last. I have used one pack to do the final sanding on a car.