I would be very careful dumping larger denomination canadian coins(dimes, quarters)...
I am about 10 hours from Canada, and every coin machine in my area has a magnet below where you slide down your coins, the magnet takes all magnetic objects(including canadian coinage, pennies, nickels, dimes, quarters, and loonies/toonies.
If you think you can get away with dumping canadian coins with the top magnet off(removing the magnet), think again. There is a harder to access magnet below that which is about 10x the size and takes up all the coins.(learned this from a teller i talk to a lot).
No issue for me, I save all foreign coins I get in rolls. Also, The tellers let me keep the rejects off the smaller top magnet whenever I dump there. I do not know about the second magnet, but this is from my understanding on what the teller was trying to explain to me. It gets cleaned every 6 months or so, it takes a machine matinence guy to access it. (Labor= $$)
HH!