When flying my spamcan outside Europe/SA/Aussie/USA I dress up like a real pilot with blue trousers, white shirt, bars etc.
I do remember on one trip in the mid 1980s I issued the girl traveling with me with uniform and bars (some number less than 4). This caused much consternation in the middle east as they did not know how to treat her, in one desert kingdom they solved the problem by locking her up while I refueled.