As the author makes note of on his website: “Styrene when used to represent wood in the model world eliminates the limitations of wood. Wood has its own grain and color. Styrene is a blank palette which can be manipulated“. I agree with his sentiment wholeheartedly.
Site 1: Making styrene look like aged wood
This great tutorial shows you how to use plastic card to simulate wood in many ways. It’s a great tutorial and worth the time to read.