RE: Will I get RF????
If you're just talking about "Grey" coloured Duct tape not "Aluminum" tape, then don't worry about it, it's just tape. Using any kind of metalized foil as a covering even over just a portion of the plane will cause RF blackouts depending on the orientation of the plane (not just simple range checks) Range will be significantly less during some positions of the aircraft relative to the transmitter. You can't map it out, except at a great distance and that won't help you out. Colour your plane some other way, don't use metalized paint or covering on it.