I did mine recently as well and am very impressed with the difference in performance and looks! I polish my boat every year so have a nice 8" akita polisher with wool and cotton pads. I used 3M compound then the 3M white polishing to finish. I did sand them first-350,800, 2000 all wet sanded than the polishing. I haven't clear coated, kind of thinking they never came that way and if I need to do it every couple of years for better output I am ok with that.

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Dave S.
Northeast
2003 4.6is
2005 E53 4.4
2003 E39 Msport(a REAL ONE!)
1959 Fiat 600