Duraglit was the preferred weapon of choice for polishing anything made of Brass as I recall and it was Brill. Of course such cards that we were, we changed one letter in the name to say something else! snigger!!!
Air Police,
You may have been at Boulmer when I arrived in August 1978. And indeed, JC was the said Sergeant Smith's nick name. He later went to Machrahanish where he got a bit part in the film White Nights. He's the Soviet Officer who marches up to the Aircraft stands to attention and salutes smartly when the side door opens.
Somebody told me he was just like Hitler! In that he had survived numerous attempts on his life.
FB