I went to the larger main dealer that has a body shoplast week, the body man there said it is polished alloy and there was nothing they could do with it, so hetook pictures and said he would contact Ford. It does look like a manufacturing defect, so I wait with bated breath. The (small) dealer I bought the car from said wheels are guaranteed for a year, but we wait and see. I need to check the spare to see if the same is happening to that as well.