So here's my thoughts on Chalk paint I've made myself... I had two recipies for making chalk paint yourself. The first one I tried called for 1 cup of paint, 2 tablespoons of product weather you use plaster of paris or un sanded grout or Calcium carbonate. I used Un sanded grout. I was not happy with the result I acheived.
It took a long time for the paint to dry, I could see the finish underneath even slighty after 2 coats... and I had brush marks. SO since this is the hyped Chalk paint that you can paint on anything I mixed up a second batch and put it on over the first attempt. I used the other recipie that called for 1 1/2 cups paint, 1/2 a cup product ( in this case still the un sanded grout) and 1/2 cup hot water. I mixed it up and was pleased with the out come. I still need to sand and seal. I am using minwax paste wax in clear for the top coat.