One of the most basic principles of oil painting states to keep your darks thin and your light thick. Unfortunately, people try to follow this rule without knowing why and may get a pre-conceived “law” in their head that they are scared to break for fear they are not “painting right.
This video below is as close as you can get to going to the museum with me and looking at a painting together.
I’m going to point out points that I think are important that will help you to understand the painting process. Specifically the process used by Van Dyck so you can add these techniques to your own arsenal.