I have a bunch of rail dust on my 13 WDP Pilot. Looks like tiny rust spots in the paint.I have a 2012 with Taffy white and no problems in this area at all. Also, my other vehicle is a 2018 Hyundai Sante Fe(Black) but on that forum, some people are saying that "rail dust" is a common issue with white paint, and i not only don't have that either but never heard of it. Evidently it is literally the railroad track dust bleeding orange spots on white paint after the passage of some time.
I smell a rat in the US EPA and it's ever stringent requirements and mandated used of water based paints.