My brother recently bought a 7 yr. old John Deere tractor. I went over to help him clean up. It had some water spotting and streaking so I tried Optimum compound and a blue pad with a PC. Didn't do much. I then figured I would try a paint cleaner. I used, and this is a blast from the past, Medallion premium paint cleaner and a orange pad. This got rid of almost all the defects and had quite a bit of green paint on the pad. I am assuming there is no clearcoat hence the green. My question is since I am out of MPPC should I continue with a paint cleaner and then polishing? If so what will take the place of MPPC? I only had a small amount of MPPC and didn't get over the whole tractor. I know this is not your everyday question.