I used 600 grit sandpaper ( wet ) then 1000 then I took my buffer with some Adams Polish on it... Worked really well and I didn't have to buy anything.
Looks great! Like a previous comment mentioned you should clear coat them so it lasts. I tried some Mothers Aluminum polish and a Powerball on the faded headlights on my Tacoma and it came out amazing so I might try it on my Fox.