Never tried it, but I would probably go 4000 and then the newspaper.
I can view the images from lilpossum1 either; it's not pointing to a url but to my own PC. I wouldn't worry. The ball will only look like a fine, not polished surface. I doubt anyone could tell how it will react. Depends on the ball's coverstock, the bowler and the oil.
I have tried it (4000 grit + wet newspaper) several times when 4000 grit didn't get me enough length. I have tried 2500 grit + Newspaper and didn't like it - still too early. Kidlost tried 2000 grit (corrected) + newspaper and loved it.
Since a 4000 grit Abralon/Siaair or the "T" pad from NEAT will get you more length than a 2000 or 2500 grit surface, I'd suggest trying a 4000 grit surface before trying a 2500+NP.