I've yet to see one that "improved" the looks of a car, even the original Porsche 911 ones. I understand that there have been improvements in the material so that they can be left on, even when wet. I wonder if UV exposure would cause paint fade lines. Since it's free, consider using it on long drives on the interstate to protect from gravel trucks and bugs, but for everyday driving, rather than a free bra, have you considered the clear 3M paint protectors?