I'm just about to take delivery of a new car, and heard of a product called 'LifeShine' offered by AutoGlym. Unfortunately, my dealership was tied in with DiamondBrite but I eventually persuaded them to apply LifeShine to my new car (after lots of fone calls to them, Auto Glym HQ and local Auto Glym distributors). They are now looking at taking the product on at the dealership, some of the reasons being - 10years guarantee, it's cheaper

, you get a shed load of Auto-Glym products at the end of it (okay, not a shed load - but a bag load) and more.....
Check out
http://www.autoglym.co.uk/frame2.html (click drop down box, top right and select 'LifeShine')
I would recommend it (although I have not seen the end result yet !) and with AutoGlyms standing in the car care market I don't think you can go far wrong. It's cost me
£199, but I had quotes right up to £275.
and no, I am not on commission