Well being from yorkshire i decided to have a go wihtout spending money and failed as i didnt have any 1500 wet and dry

So a trip to halfords and 40p later i started..
first take 1 set of badly scratched and dull lights

then rub down with 1500 wet and dry (halfords) using lots of water (this took me 10 minutes a side and I contiued until they felt smooth) This can be quite messy, and you'll need to wash them well after this and leave to dry!! At this point they will look cloudy...
like this

Then I used some meguires stage 2 paint cleaner (Its similar to most basic cleaners and t-cut will do the same job, if not better?) I applied this with my machine polisher with a medium sponge (A drill with a similar sponge would do the same) and ran over them for a few minutes using 2 speeds.
and this gave me

and to make them shine i used meguires stage 3 carbuna wax (something i had lying round the house!)
and i now have

Total cost 40p for the wet and dry...everything else is basic polishes that most people will have lying around?

No O.C.D round here cleaner boys!!
