The best paint to use on fabric is fabric paint, as it is specifically designed to stay on fabric and not peel, crack, or fade. Fabric paint is available in various colors and finishes, such as matte, satin, and gloss. It can be applied with a brush, sponge, or spray and is typically heat-set to help it adhere to the fabric. Other paints, such as acrylic or oil-based paints, may not stay on fabric as well and may require special techniques or additives to help them adhere. It is important to test the paint on a small, inconspicuous area of the fabric before applying it to the entire surface to ensure that it will stay on and not cause any damage.