N.L.
If you try to stop her now she will just want to do it even more. I think you hit the nail on the head with your title. She is high maitnance, its not genetic just her personality. My daughter is 5 and has expressed similar actions. I do not let her go out of the house with out washing her face when she has played with her make up. And I do think you are doing the right thing with limiting her purses. She can't use them all at the same time. There must be some other type of activity she might be interested in besides herself try to refocus her energy. hope my thoughts helped.
N.