Similar to the "Reverse Graffiti" post i made last week, this is also a form of art created by the act of cleaning. Well Kinda...
"Like any reasonably creative and curious human, Scott can't resist a dirty rear window. We suspect that Scoot started off with the cleaver sayings, like, "Wash Me" or "Is your wife this dirty too?". Probably his first was the ubiquitous smiley face. Unlike most folks however, Scott lives on a mile and a half of dirt road - caliche, as the locals call it, road-base: a blend of limestone dust and gravel and clay. Driving over this surface results in a fine, white dust that billows up behind any vehicle driven faster than a galloping turtle, coating the rear window. Being an experienced artist, it wasn't long before Scott was experimenting with techniques to achieve these amazingly detailed and shaded drawings."
Check out more...they're amazing!