I put some green face paint on my face onece for a band performance, and it turned out that it had stained my skin. As well as everyone else's. I had the idea to wash it with Hydrogen Peroxide. Not only did it work, but my skin cleared up immediately!
Caution: don't soak your face or it will bleach your skin.
Recommendation: I used it as I would a toner- apply it with a cotton ball and rinse off. (this way you dont bleach your eyebrows or eyelashes).