It's much easier if you start with a little better image. You have to manualy touch up the uneven color in the primer. And a lot of detail is lost in the dark areas.
If you start with a clean image, just select the area you want to paint, and copy that to a new layer. Then you can mess with different color and hue fills, adjust the RBG, levels, etc. until you get it to look like what you want...
Here's what I could do with your image... I think it's a brighter blue than you asked for, but you get the idea. I had to do a lot of extra stuff to get it to look half decent.