Just finished removing a scary amount of oxidized paint from a single stage red 1986 Porsche. Used 1Z UPP followed by PP. Surface looks really good. Is there any real need to use AIO before SG and then wax? I am concerned with all the color that keeps coming off on my pads, and don't want to push my luck. I realize that AIO is non-abrasive, but what added benefit is there at this point? Thankfully this is not my daily driver, since this has been taking me a long time so far.