What Is the Golden Rule of Oil Painting? Understanding Fat Over Lean
If you are learning to paint with oils, you will eventually hear the phrase “fat over lean.” It sounds complicated, but the idea is actually quite simple. It is often called the golden rule of oil painting because it helps artists build layers in a way that can improve the stability and longevity of the finished work.
The basic principle is this: start with leaner layers and gradually use more oil-rich paint or medium as you move toward the surface.