Painting colors for fine details on a sherman (shermanfreak this ones for you)

First there is a holder for the periscopes ..... usually O.D. Then the periscopes themselves are either all black or O.D. down to the lens part which would be black.
The vision blocks in the cupola are kind of a smokey dark green to black in colour. I usually just paint them with gunmetal. after all the weathering is done,, it's hard to tell exactly what colour they are anyways.

Thank you very much for not only your help now shermanfreak but for all the help you have given me on these forums. You too everyone else. But especialy you shermanfreak, even durring the group build you still found time to hlp me and for this I thank you.