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Well the higher that you go in number the more fine it is so its less coarse, and yes you are correct either side to side or up and down it doesnt matter just dont swirl it, and you can look at it and see how fast it goes down. Once you knock most of the peal off you can go up to 2000, theres no need to go up to 3000 the polish and buffer you use should take out the scratches from the 2000.
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