Detail question of the 1942-48 tail light lens

[tinsled]

I'm restoring the tail lights, now mended and polished the lenses outside.

Then I noticed, that inside the long pointed part there is a arrow shaped area, which has been painted or plated.

The paint has partially peeled off (or better say crumbled) - cannot figure out the original shade nor the purpose.

 

How should I restore this area?

By painting? What color? Maybe silver plated?

 

Thanks for advice,

Pekka

See below photos:

1) The actual part with partially flaked off coating (detail photo)

 

2) 1942-48 Roadmaster tail light assy

3) 1942-48 Roadmaster tail light lens

Edited January 23, 2017 by tinsled
added photos (see edit history)