I've decided to scrap the two helmets and proceeded with drawing something new instead, picture 4 posts down is the one I'm drawingGreetings, I started drawing the helmets the guys in Daft Punk uses yesterday and the first incarnation was this :

I felt that the helmet on the guy to the right was not completely realistic in terms of lightning, one reason for that was me not having a fixed source of light on either of them.
So I did what any man would do and recoloured:

The source of light is now currently in the top left corner, slightly behind the helmet. I'm not entirely happy with the colouring however, and I'm not sure how to properly fix it so I would very much enjoy C&C on it so that it can become a lot better

Thanks in advance!