Well, after looking at the pictures in Bob's thread, watching Shark's video, and reading in other places, it seems that a couple of things I had read before were incorrect.
I see now that the inside of the hatches were painted the same color as the base color of the tank, with the periscopes and center of the commander's cupola being painted black.
That makes things easier on that count.
Now I am down to whether or not to base coat the tank with the red color.
Steve