Les, All those particles do add up to some value of radio frequency attenuation. It's that reduction in signal level at the receiver's antennas that I am concerned about. It doesn't block the signal completely but may be enough to reduce the margin of safety. I know guys have gotten away with using it but I would rather not risk it unless one of the manufacturers, like Futaba, can provide test data one way or the other. That's why I went with the faux metallic paint. Dan.