Found this cool and useful painting tutorial that shows you how to paint Master Chief. I found it completely helpful and tried it myself. Of course, this finding was found a while ago, and still very helpful. You can view the original here: how to paint Master Chief.
Not only a picture showing you how paint Master Chief, but it also seems to be a drawing video on YouTube of this exact tutorial. Enjoy it if you found things a bit confusing. For me, I just used the image. It’s a way I use of learning.