I had used one of the other kits likely a turtle wax or similar] before on very scratched/yellowed Benz E300 covers. The 3M kit, with drill-driven pad, was far superior. Be patient, take your time, and good results you will have!

Rig, glad to hear as I was not too impressed with the turtle wax and it was NO better than before so I figured not only did I waste time I removed the factory coatings and now have to worry about that...ugh.
But after reading a bit more about coatings here, and some input from Jay about Opti-Lens I'm confident I'lll get it correct this next time.. I really love seeing the defined cut-off pattern from fresh HID's and since only one headlamp is showing me that I knew I had to take a second crack at the headlight NOT showing the defined HID pattern cause its a bit fuzzy still. I'll get it this time.