Sanding even with 2000grit is more noticable than the pebbles, dirt etc etc thats kicked up from the vehicles infront of you or Sand trucks etc etc.

Best thing to do is only sand down the area that needs it the most and dont touch the rest so it stays clear with no markings from the sandpaper. Thats all Im going to do. Saves me money that way even if it doesn't look perfect.