What is the layer of film that covers my vehicle between washings?
What you are referring to are black particles that come from areas of heavy traffic. They are gritty, abrasive substances coming off tires as they wear. Also, chemicals from diesel smoke and other emissions in the atmosphere will settle on your vehicle’s surfaces. In the Atlanta area we have fallout from Jet exhaust. If this residue isn’t removed immediately, permanent damage to the finish can result.
