Do you have a lot of construction / gravel trucks travelling the highways in your area??? I haven't had any issues & as of the last wash, I don't see any marks on the hood or windshield of the Pumpkin. All of my driving is on asphalt roads, mostly the Trans-Canada Highway & most vehicles are Super-Sized Pick-ups hauling air or pulling trailers with ATV / UTV's on them or transports. I do have a little bug / stone deflector on the front, but I really don't know if it helps or not... Maybe look into one of the deflectors??? Just a thought...