As a result of your reply to my reply (??!), I searched for the article in question, and actually found it!
The subject of the "bumblebee" rings comes up in Airliners No. 61 (Jan-Feb 200 issue), page 12. It seems that these rings are a special anti-static conductive paint. The reason for this is to prevent p-static buildup on the airframe.
The reason that I recalled lightning protection is that these rings are connected to the lightning diverters built into the radome. I apologize for my faulty memory.
P-static or precipitation static charges interfere with radio reception and transmission on an aircraft.
Hope this helps.