Wow, Erik, that is cool!
my f-104 fuse was completely covered in flite metal and the single Futaba r6014 RX buried inside with the antennas inside. No reception issues. I also had a 1/5 scale mustang that I also covered compeletly in flite metal, RX inside as well, no trouble. My gut says you should be fine. Just range check thoroughly of course through 360 degrees while running, etc.