I tell u what is the problem .....when u travel on motorway at night all insects hit the front bumper with velocity , their blood penetrate in the paint that stains never be clean it a happened with me in my car 2013 civic black, last Sunday I thrice washes it with meguirs was and wax , then rubbed it for half an hour with scratch out then wax it with meguirs wax , still I can see the light spots :(.
My suggestion is that when ever u travel on motorway do wax ur car so it will protect may be..
sent from my galaxy note 3 sm-N900