I did the job on my F10 myself. I asks the dealer to hand wash it and leave it in a service bay until delivery the next morning. I started with Swissvax blue clay, followed with Menzerna sealant and finished with Swissvax Blauweiss wax applied directly by hand.
I was shocked and how much filth there was in the finish that the clay got off. Not a scratch, swirl and haze to be seen. I also took advantage of the opportunity to put sealant on the door jambs, channels under the hood an trunk, etc
2013 F10 535i xDrive Space Grey, Oyster Napa Leather, DHP, HUD, Rear Entertainment, Luxury and Executive Package