What is the official legislation regarding face painting?

I’m a face painter in the UK and, as yet, there is no official legislation with regards to face painting.
I will be (hopefully) coming over to the states either in the summer or around December time and I would like to take my paints with me.
I have £2m public liability insurance – providing that would be still valid in the U.S as well as UK would that be enough to cover me or do I need other stuff to do or know about?