Ok that's pretty cool!! I love the idea Thanks!

Milk Paint is a natural-type powder made from milk protein, clay, pigments, etc. You add water to it and mix it up and can add a bonding agent to make it stick to many different types of surfaces. Its environmentally friendly, non toxic and no VOCs. I use the Miss Mustard Seed Milk Paint brand If you google it she has a nice webpage that talks about it and shows the colors.

What is milk paint? Can you buy that or make it?? I've never heard of it