I live close to Ullapool and the guy who owns and set up the Highland Aircraft museum is a friend of mine. I have done some restoration work on the elevators of the Hunter. James Campbell who set up the museum did so because although never in the RAF he has a great interest in all things flying. He has used his own money to do this and with the aid of his father have produced a great little museum.
Nice set of photos – I thought that infra red film was sensitive to heat and not to the type of material in the photo, or have I misread your post.