Part of our 3-Step polish series, Polisher Step #1 contains our largest sized polishing granules for the removal (not hiding) of bad scratches and heavily oxidized paint. Our unique polishing granules reduce in size as you apply the polishing agent. Once you're done with Polisher Step #1, move to Polisher Step #2, and then finish up with Polisher Step #3. Not only is this safe for machine polishing and hand polishing, it was formulated specificially for doing just that. All in one polishers dont have the effective granule sizes that our three step polishing does for maximum effectiveness (Same as how "all in one" shampoo and conditioners dont work as well on your hair). When you want the job done right, do it the Perfecar way.