Similar to Pontious, back in the 90's some enterprising young man in Edinburgh bought a batch of out of date Mk 2 jackets and was selling them to the Neds as summer jackets. I remember seeing two young chaps going clubbing on a Saturday night wearing their new jackets, only to have a shock when they took them off to find their best dancing clobber was covered in black charcoal dust. Showed up great under UV light......