Question for B-17 veterans! Interior, painted or not?

This question is mainly for the B-17 veterans here. I would like to know, on the aircraft you gentlemen crewed, was the interior of your aircraft painted or natural metal? I'm mainly looking to see where the painted areas of the interior are. For example, I know that the waist areas were mainly unpainted natural metal throught the war, regardless of whether the it was a B-17F of G. Is this correct?
  How about the radio room, nose compartment, flight deck and bombbay?
I build models of the B-17 and just want to get it right.
 
Jeremy