I'm a New Zealander, we don't have friends in Australia! :evil: Think in terms of Dutch and Belgians, Canadians and New Foundlanders, Americans and Canadians...
Sand blasting won't do a lot of good on double-shot caps.
Seems almost a sin to dye double-shot key caps - no matter how old and yellowed they may be - given the respect they garner hereabouts. I'm scared that if I dyed 'em, I'd get even more rotten fruit, bricks and stones hurled at me from people here than I'd get for the above dig at the Dingo-molesters "next door"...