Jtb106 From , joined Dec 1969, posts, RR:
Reply 1, posted (14 years 3 weeks 3 days 6 hours ago) and read 2324 times:
I believe it's a protective coating. There was a time when the 'black dot' was common. Then, I believe it was actually rubber or something. Later, paints/coatings could achieve the same thing and were applied to the radome. Maybe AA went back to it out of tradition a la the flat black paint under the windshield on SW planes?