[Soju Lizard]

Gary is right. I had the same spots on my silver upon delivery. The dealer was kind enough to have a detailing shop buff them out at their expense. I then went over the entire car with a clay bar followed by some carnauba wax and Klasse sealant glaze just to be sure. Once removed, they shouldn't come back. I think the decontamination kits are more for protection in cold weather climes where the roads are salted rather than rail dust.