Nice write up on the adjusters, but I disagree with the 'resto' part.
A hand polish using the G3 will not sufficiently get the product upto temperature, and as a result will not 'polish' anything. The lens will look clear, but will 'yellow' very soon afterwards, and be even worse to correct.
Machine polishing when using a cutting compound is extremely important (well, the temperature is extremely important).
Lastly, there is no point in going to the work of making your lenses shiny-new if you don't protect them afterwards. Afterall, the UV protection has all but diminished, causing them to yellow or craze in the first place. Anything that was left has just been dumped in a bucket of lubricated water along with your sandpaper.
The most important part of Polycarbonate restoration is the final step - UV protection. There are many expensive creams which claim to do this, none of which I have found to work (unless you apply it almost daily, and who is going to do that)? 3M (along with others) do a UV resistant clear film, which should last 3-5 years in the UK climate. The Omega headlamp isn't the worst out there to cover with film, but it's still not a nice job.
For the 'average Joe' I'd recommend using a rattle can of Clear Coat Lacquer (the stuff you would use when painting body panels). Nothing special is required for this, a simple lacquer from Halfords will do the job just fine. Obviously, removing the headlights from the car would be advantageous, but a decent masking up doesn't take long.