Well, you can use any marker in woodsball. What are you after in your case? If it's a bright color perhaps paint it black or have it ano'ed black? Or are you actually wanting to make it more milsim'ish?
I think it's fair to say that "woodsball" isn't about what gun you use but HOW you use it and your own personal tastes in how the marker feels and shoots.
I just thought I'd take a quick peek and then the world went all yellow.....