On the way up to get a paper from Costcutter this morning the local police are giving away Smartwater outside Costcutter until 3pm.
"SmartWater Instant’s unique forensic fingerprint is almost invisible to the naked eye and fluoresces under ultraviolet light. Instant is primarily used to code vehicles (domestic and commercial) and outdoor equipment, although it is suitable for use on most general household items."
I already use the stuff at home and work and if the police find stolen property they routinely check it for Smartwater so they can track the owner. I'd recommend getting some if you can get up there before 3pm.