Bret,
Have a look at this
http://www.airplanecolor.com/
It works great and you can see what it will look like on the plane at different angles and the like.
I am designing mine on the foundation of a vintage racing ferrari. With my own symbol in the Yellow shield (scoprion) etc.
Was going to do the gear with the same design as the prop, still not sure about that.
I had a look on your site and its a great builders site but was surprised that you were using a different plane to do the paint design work.
Hopefully this can help you.