John (@johnb), I think both approaches to navigation lights have use because not all nav lights are clear covers over colored bulbs. From a purely efficiency point of view, it would be better to have the same bulb for both sides and a colored light cover. The approach of painting the inside could represent the colored cover well as long as the plastic isn't too thick.

Since I've learned that clear plastic can be worked just like regular plastic and then polished, navigation lights and other clear parts have been less trouble than they used to be. But I can't help wondering why manufactures seem so slow in molding clear parts with parts of the surrounding structure so that it's easier to fit them and fill any seams. I know they do this with canopies and windscreens, but any clear part is fair game for this sort of treatment.

Wash applied on the upper side and bottom side. Just a few items left, like antennas.
From the pictures it looks like I need to reduce the wash a bit on the bottom side of the starboard wing.

@clipper, thanks a lot, Carl. If home constructions don't occupy too much time, I might finish it within the next week.

@fiveten, thank you, Spiros