I have used the 3m kit on a few of my Bimmers including the X and I have to say it works awesome. The lights come out looking brand new as long as you take it slow and follow the directions. I was ready to order new plastic lenses for my E46 until I tried this and I was sold. After 2 years they still look perfect, I do polish them with plastic polish (Plastix or whatever its called) when I wax the car though.

FYI, The last 3m kit I ordered through Amazon and it was cheaper than Autozone even with shipping.