Shame Paddy isn't posting as much here as he used to. IIRC he posted a step by step guide to polishing British Army style from his days of spending many an hour to avoid getting in the brown stuff on inspection.
I read an account of one man´s national service where he recounted a similar procedure concerning Guard Duty for the night where the smartest and best turned out
man would be excused and allowed to return to the barracks.
My friend in the USAF tells me there's no longer a black leather boot used ANYWHERE in the US military.....