a basic method i found worked ok...
wash, clay, wash and dry car then wipe with IPA/ Panel prep.....
using a Polishing pad and megs #83 to start spread at on speed 2 ish then moved up to about 4 ->5 then after several passes went to five then back to 3 1/2 ish then see what i had there were a couple of areas where i found deeper marks and scratches so hit them with a compounding spot pad with #83 then polishing with #83 again to remove marring..
i found that megs 80 takes for ever to break down so ended up......
opting to go straight to Menz RD85 final finishing on a polishing pad and worked this in really well then buffed off.
then hand applied Dodo Lime prime Lite left several mins then buffed off
next i used Collinite 915 on a spot finishing pad with the occasional spritz of megs Last touch to lube the pad (managed to lay a nice thin coat this way) left for a min or so then buffed off...
I found a good selection of spot pads invaluable due to the amount of curves and the general shape of the GP the 4" are ideal for the doors and sides where as the 3 1/2" came in handy for the bumpers
Treated black trim to a coat of AG Bumper care