I remember in my college days that my roommate and his best friend were "Gone With the Wind" fanatics. So, at Halloween, they decide to dress up in "Gone With the Wind" costumes.  I don't the film well enough to remember the characters' names, but one of them decided to dress up as the black slave girl.  They decided to use black shoe polish to paint their skin.  After the night was over, they found out the black shoe polish did not come off quite as easy as it went on.

I am sure your green cream isn't going to be nearly as bad - or as toxic - as that black shoe polish. 

(I'm sure this doesn't help you, but I needed to retell this story. )