I have been painting cars for almost 50 years. Not as a pro, but as an avid hobbyist. Over the years, I have tried a LOT of different polishes. About 20 years ago, I tried the 3M 3 step kit. It has 3 polishes (fairly aggressive, fine and very fine) and 3 foam pads (one white, one black and one blue. The picture below shows a wool pad. I'll get to that in a minute. The bottle with the white cap is the most aggressive. You use it with the white foam pad. Then you use the bottle with the black cap with the black pad. That gets did of 99% of all swirl marks. Then you use the bottle with the blue cap with the blue pad. It is a very fine polish that gets rid of the rest of your swirl marks. I have tried using the wool pad with the white cap bottle followed by the white cap bottle with the white pad, but I didn't see any difference, so I just stick with the 3 steps and the three foam pads. You can get a kit without the wool pad. I will mention that the first step (white) polish is the most aggressive of the three, but it is not real aggressive. To use this system, you will need to wet sand the paint. I put clear on everything, and I wet sand with 1000, 1500, 2000, 2500 and finally 3000. The shine I get is excellent.
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