All down prefence in my experience. I use Poorboys SSR2 2.5 and 3. Alwayd does the job for me though people find they breakdown too quickly for some.
As above the Menzerma or the Meguires polishes seem popular on DW.
As long as you buy differnet grades and have different pads to test with you should be fine.
Start with the less cutting polish on a polishing pad and then try a slightly heavier cutting polish, then change the pad up to a cutting pad with light cut polish....
Test on a small area until you get the finish you need.......
If you find a heavy cut works best then you'll need to finish with the lightest cut combo to remove any holograms....
Good luck mate.