Considering we have trouble writing "wash me" legibly in our dirty car, Scott Wade's rendering of "Friend in Need" (aka "Dogs Playing Poker") on the rear window of his Mini Cooper indicates a particularly high skill level. Or really dainty fingers. [Thanks to Kid Dig It.]
Dust Art [The Statesman (TX) via Boing Boing.]
Related:
When Airbrushing Goes Bad [internal]