I also got caned by prefects at Fettes in the 1960s.
It has stayed with me and has been an enduring interest for some reason, but was not that common an experience at that time
It was done over the back of two chairs in normal clothing, or in some houses in games kit.
I doubt if it was much different from other mainstream public schools in that period.
At junior school a teacher used to call the cane the whistling stick.She often ” whistled ” the stick in front of us but hardly ever acually ever used it.
My deputy head once threatened me with ” Two cuts of the shtick” He had a slight speech impediment