SynDirt

I saw a large, very dirty truck on which someone had scrawled in the dirt on it's side. Instead of the usual "Wash Me" request, they had instead written "Test Dirt. Please Do Not Remove."  It made me laugh and wonder if this might be the perfect quality control experiment for a synthetic dirt company?  They could cover a truck in their SynDirt and see if anyone can't resist the urge to articulate the vehicle's need for a bath.  A real dirt graffiti artist won't be fooled.  Unless it's high quality synthetic dirt, that is.