Get a "California Duster". Dust is easy. Rock chips, not so much. I guess it's too late now.I removed it already with heat gun. On a white car this looks terrible. 5 miles after cleaning the car a line of dirt builds up and makes it look like car is scratched. Probably fine on a dark car.
With the "hour glass" shape of the Q60, stone impacts in front of the rear wheels will happen.I am sure the Q60 spent some time in a 'stone chip wind tunnel' to determine where the air flow directed the rocks on the side of the car. I know my 370Z had stone chips in the general area where the Q has the protective plastic film. I imagine Infiniti was just trying to head off some complaints.