Block with 1000, 1500, 2000 then go over it with an Abralon 4000 DA pad. It will almost shine when you are through with the Abralon 4000 DA pad. If you still see sand scratches after buffing you are not doing enough finer grit sanding. After buffing with wool pad you can then work it with a Porter Cable orbital polisher with some final glaze. The Porter Cable polisher is not as aggressive as the buffer and you can work it longer.