Sponges are perfect for bringing texture to your watercolors and other watermedia paintings. Perhaps the best sponges for painting are natural sponges, available at artist’s supply stores or hardware stores. Or you may want to try man-made sponges as well. But it can be tricky to formulate the paint mixture you want to apply with a sponge. Even after dampening with clear water, sponges can hold quite a bit of pigment mixed with water or pigment mixed with medium. Therefore, you’ll need to mix larger amounts of paint than you usually would, and make sure the color is strong enough. And test the mixture on scrap paper before applying it to your painting. From soft, mottled effects to rough or dappled applications, you can create a variety of textures with this versatile tool.