No problems here either... done several combat sloper foamie P-51, MiG-15, and F-86... done them all in silver Ultracote and run the antenna completely inside the fuse down to the tail, then zig-zagged through the coroplast flutes.
Total antenna area NOT covered by metal? 5 to 10 quarter-inch spots every 4 inches along the rear-most foot or two.

The only time I have had problems that absolutely were radio hits were when I had metal-to-metal on control surfaces, and only then with AM radios. I once had a stripped servo arm that acted like a hit