what is the best way to remove it from the paint?

is it coal dust or is it oily from the exhaust?

clay bar, then usea light polishing compound by hand Tom (your good at that anhow we hear)...I had some on a ford truck I didnt see, it started rusting underneath the film had to remove kit, have the hood buffed and then reapply.

Rail dust is a bigger problem with a white vehicle then others because it stands out. The previous post was right about clay bar and a cleaner wax.

If the vehicle is under warranty take it back to the dealer- free detailing.

Don't be shocked if it comes back especially on white and in salty air environments.

what is rail road dust?

We only have wagons here

rail dust is when the cars are transported by trains, the steel wheels on the train and the iron rail of the track create friction and small amounts of hot iron dust settle on the horizontal surfaces of the car and melt in to the paint and rust, on light color car like white it looks like tiny specks reddish brown (rust) in color. the clay bars with a lubricant picks up the small iron chips on the surface and the buffing removes the rust stain left behind, i have seen it years ago so bad that you had to refinish. most vehicles are transported with plastic sheets on the horizontal surafaces this day and age so rail dust is seldom a problem but does occur.

later

White Ford 05 F250 out of warranty....did not show up until I left my Truck in Galveston for 3 days, Salty area


Thanks for the info....where can I get a clay bar??

Thanks I wondered what the white plastic was for. The dust is kinda like when I wasted 2 months porting my iron cylinder heads and the dust rusted on everything that it got on I hate cast iron buggers

Mequire's or similar sells a clay bar kit at Advance Auto Parts/Pep Boys and the like. Its very small though, and a bit hard to work with.

You may try a local Auto Body Supply shop. They can usually be found in the yellow pages.

Have you ever seen a dealer's "detail" job. I won't let them touch my vehicles. Personally I don't like swirl marks, or burned paint.

Some salesmen get offended, but do you really want the Mexican outback detailing your 50k $ truck?