Miss Mustard Seed Milk Paint Grain Sack is a soft natural gray. Named for the color of antique European grain sacks. It’s a chameleon color that sometimes looks white and sometimes looks gray depending on what is around it. A sample of Milk Paint will cover approx. 10 square feet, a quart will cover approx. One quart of milk paint covers approximately 70 sq. feet. Simply mix this powder with water- it’s that easy! A Milk Paint finish is unique and can range from a solid color to a stain, it all depends on how much water you add! It can be used on any porous surface without a primer. It will never chip or peel on porous surfaces as it soaks in and binds with the substrate. If your painting item is not porous, you will need a bonding agent to not have chips or cracks. However, that's why we use it! We are in love with the chippy vintage look!