When you say that you use sewn pads for up to the rouges and then the loose wheel, where does the green and white come in compared to the rouges? Would I get the loose wheels for the green and white? I saw this wheel, a 6" x 1/2", would that be the correct one? Is there a recommended place to get the buffing compounds? I looked online but was a bit confused by all of the different ones out there (most were green...). Any more advice for the thoroughly confused?