I did this with just Krylon. Started with the brown, then did black, olive green stripes to break it up even more, then light light tan as highlights on the "branches" which would work nicely for the oaks. This was my first job, and i just followed the steps highlighted on the forums here. it's like "how to paint a rifle stock" or something. Like i said, far from pro, but effective none the less. just have fun with it. best thing about Krylon, you can re-do it.