Dutch artist Levi van Veluw uses his own head as a canvas, as he did in his 2008 series "Landscapes", pictured above. He doesn't accept help, but decorates his head completely by himself. At the link, you can see more examples of his work and a video of the artist decorated as a country landscape with a functional model train circling his head.
Link via Jules Crittenden | Interview | Photo: Levi van Veluw
http://www.artbreak.com/work/show/186541-earthman-steohawk