I know I've seen this posted in the past of this artist who makes designs in the dirt on his car's boot. Well now I see it posted in the news.

Link

 

And his cars hatch, since he does it on his wifes mazda

 

Nice art, but I'm glad my Mini never gets that dirty long enough to use it as a canvas.

 

It took Tuls only like a week of owning his MINI before he found a spot filled with powder snow type dirt where he proceeded to run laps. It took about 4 washings to get the stuff off his MINI! :P
That guy would have had a field day :D