Hey I'm new here and I'm not sure if I'm even dong this write but let's hope for the best. Anyways my car has this weird white crusty substance on the door sills. The plates that are inscribed with the model's name to be more specific. I'm not sure how to take care it, it's ugly and bothers the shit out of me. I've searched around and I can't find answers anywhere. Hopefully I can find some help here. If you guys want I can upload pictures too. Thanks.