There is a bit of a design flaw with the Model Y as delivered. The rear door panels are part of a flare out near the rear wheel wells. The result is damage on the paint due to debris being constantly thrown on it from the front wheels, especially in the winter. Tesla has started selling a PPF kit to address this issue. Really should be a factory install. Would recommend everyone get it asap. We had quite a bit of damage before we noticed it. For folks in the Toronto area, Ceramic Pro Vaughan is offering a free install as per the pic. Bit hard to see, but does the job nicely. They supplied the PPF.