Originally Posted by cncmastr
It may be cosmoline residue if they're still using it, which is wax protectant shell for the car during transport.
Do you know the color of this cosmoline wax? It appears on my car as a slightly gray hue compared to my AW paint, barely noticeable, the color could be likened to a thin layer of dust.
I can't seem to wash it off, hopefully the next time I get a detail this residue or whatever will disappear.