Dry brush Medium

In dry brushing, the idea is to highlight (apply paint) the raised surfaces. This is realized by applying a very small amount of paint to your brush which is a lighter color than the painted area that you're dry brushing. You move the brush across the grain of the texture. With very little paint loaded on your brush, this will only leave paint only on the raised surfaces, simulating how light makes these surfaces lighter in color. This technique is perfect for painting lures with a fish scale texture or for painting gill plates.