I keep telling you guys Porter Cable, cutting pad, any of the above mentioned cleaners, Meguiars, 3M and it takes 5 minutes tops and you don't have to use sandpaper on your lenses, and you have something to buff your car with. (I know I'm the king of the "run on sentence")
It used to take me an hour to hand buff my car, the PC takes it down to 20 minutes if that.
Pat