i`m not sure if you got your car new or used, but i have a camaro with black paint that had a bumper replaced a few years ago. whatever paint/clear they used, no matter the fact they told me it was top notch, swirls every 3-4 washes for me while the rest of the car in stock paint/clear takes dozens of washes before i notice any marring. if it`s just one panel with this problem then it may have been repainted at some point.