Can someone please tell me what material the chrome trim that runs under the side windows is made out of? Is it chromed metal, or chromed plastic? The reason I'm asking is because although the car is less than one year old, I've noticed some tiny rust specks on the side trim. I've also checked the chrome trim around the front grill and found no such rust, so I suspect the spots on the side trim might just be from brake dust. Any insight is greatly appreciated. Thanks.