When I was building my stick and rag Renegade, Poly Fiber told me that the UV coating would NOT affect radio signals.
I put my comm and nav antennas inside the fuselage. I am using an ICOM handheld attached to the instrument panel with Velcro. I am able to monitor aircraft in the traffice pattern 125 miles away when flying at 2,000 agl. I have had consistent communications with the tower from 20 miles out (that's 20 minutes of flying time in the Renegade). I believe that you will find that the uv coatings are not metallic, but an inorganic material. Jim Vance va...@claflinwildcats.com