Tamiya represent this as a clear part on their 1/48 HE219 and JU87G.I painted the area beneath it in RLM66 as per the instructions.i wasn't brave enough to try painting the sunburst pattern on the inside of the transparent part!.\ said:Exactly as Joe describes it.
At 1/48 you might be able to represent antenna (lower photo) but you'll need to be brave to do the aluminium foil fixed to the inside of the plexiglass
Cheers
Steve