Hey guys thanks for this wonderful and informative forum. Somewhere here I've read about rail dust sticking to th car paint during train transport and eventually corroding. I got my car beginning of this winter and never thought that this will happen, After cleaning and waxing my 5, yes I noticed some rust spots/dots EVERYWHERE, so I contacted my dealer and mentioned about this and they say that Mazda will fix this as I am warrantied from paint defects. At first they want me to pay for the rental but I said its covered by my extended warrantee. So I have them see and inspect the severity of the damage and they say to schedule it next week and they will have professionals do and rebuff the exterior and will also provide for the rental no charge.