Make homemade chalk paint using latex paint, cool water and either Plaster of Paris, baking soda or unsanded grout. Chalk paint achieves a chalky patina finish that creates an antique look. Making homemade chalk paint is an economical alternative to paying often high prices for it in stores. The more baking soda, unsanded grout or Plaster of Paris added, the chalkier the finish will be.
For Plaster of Paris chalk paint, mix 1 1/2 tablespoons of cool water into 2 1/2 tablespoons of Plaster of Paris until the mixture has a smooth consistency without lumps. Pour the mixture into 1 cup of latex paint and mix well until it dissolves fully. For baking soda chalk paint, mix 3 tablespoons of cool water with 1/2 cup baking soda. Mix it into 1 cup of latex paint until fully dissolved without lumps. For unsanded grout chalk paint, mix 1 tablespoon of cool water into 2 tablespoons of unsanded grout, and mix this into 1 cup of latex paint until smooth.
Chalk paint dries very quickly, and it starts to thicken if left exposed for a long period of time. Only expose the amount needed to paint with and store the rest to prevent thickening. If the paint does thicken, add a small amount of water to loosen it up.