The brand of milk paint that we use is made from casein (a protein found in milk), lime, a plant-based filler, and earth pigments. Our milk paint is VOC-free. Milk paint is unique in that it creates a beautiful, textured finish that can be easily distressed to achieve a vintage or antique look. It is very durable and can be used both indoors and outdoors. We generally add a Walnut Oil finish to the dried milk paint finish which, while it darkens the pigments, provides some protection against other oils.