REALLY useful guide. Bought a pair of bare Xenon headlights for very little as the passenger side had some pretty horrendous scratches. I knew it was going to take some time but the results are well worth the effort. I started at 600 (i did say it was heavily scratched) moving on to 800, 1000, 1200, 1500, 2000 and finishing on 2000 grit. I still need to give them a once over with Plastix but even with a hand polish i and stunned by by the difference.
I do have wrists like a T-rex now thou!