Hi Jimmy,
Yes, sorry I forgot to explain that. The two pads are of different hardness's. The white one being firmer and "rougher" than the grey one. The white one cuts heavier, in combination with the heavy cut compound it takes scratches out very fast. However, if you were to use the white pad with the swirl remover, you would still have swirls as the pad itself is somewhat abrasive, conversely, if you tried using the extra cut compound with the grey pad, it would not polish out as well since the polishing compound would work it's way into the pad faster than it would cut the surface. Eventually it would come out ok, but it would take far longer and you would seriously risk burning the clear. Also, you don't want to use the same pad for 2 different compounds, if you tried using swirl remover and the extra cut compound with the same pad, you would still have some of the grit from the extra cut compound in with your swirl remover and never be able to fully remove the swirls. I wipe down the wing in between the 2 different compounds yes. When buffing, you keep going until the polishing compound is almost all gone, it will break down as you polish, starting out quite aggressively and then toning down into a smoother finish. If you are having to wipe a lot of polish off of the surface, you are either using way to much polish, or not buffing long enough to let it work properly.
Jeremy