Well first and foremost.....Hello and wecome to the board. You should really make it a point to introduce yourself in the general information section when you get a chance. There are many amongst us that I'm sure would love to greet another fett head.
Now, with that being said, let me move on to your question. I have recently painted my armor and used a color known as "US med green", which is an airbrush paint put out by Pollyscale. If you don't own an airbrush, then I would be at a loss for what color to by as far as spray can paint would be concerned, but let me say that I am very pleased with the outcome of the Pollyscale paints. Check out this thread to get a listing of the paints, and more info pertaining to this topic.