David Walker uses spray paint to create beautiful graffiti portraits. He works under self-imposed constraints such as "no brushes" and the results are quite stunning. What's more, according to the article that tipped me off to him, he only started painting three years ago!
Beyond that tiny tidbit of information... I know nothing about this guy! If someone has a good bio link please post it in the comments. His site is pretty slim on info - but that doesn't mean we can't enjoy his work!
Feast your eyes on these paintings!