Sine I couldn't find a smaller Hello Kitty to make a mold of, I decided to make a mold from my Hello Kitty PEZ.
I painted the head with acrylic paint, since that was the only paint I had laying around the house. After I had painted it, was thinking, how would I stop the paint from coming off the head? Now I doubt that anybody would jump in the pool with the bow in their hair, but if I do make buttons and sew those on sweaters, those would have to get washed eventually.
So I looked around JoAnns and found Acrylic Coating, where the spray paints were. I tried that out and washed the Hello Kitty face. The paint won't come off, and I think the acrylic coating made the face shiny. Now the button making can begin.