Give pax an option. Either body-scan or get half undressed; belt, wallet, overcoat, jacket, shoes, pocket change, metal bracelet watch, go through x-ray and then get dressed again. Which would you choose?
Body-scan was on trial at Heathrow 1-2 years ago. Every week when I travelled I would try to get the body scan. Trouble was, the great travelling public saw how much quicker/easier it was and so they all chose that! Consequently the body scanner was swamped and I generally had to go through the undressing/dressing malarkey.
Body scan will be accepted very quickly if offered.
Oh dear!