I fly AMS»ZRH»YUL»YTZ a few times a year on an Aeroplan reward in J. Nice lounge in ZRH at the E gates with a balcony to get a good look at the planes. The Air Canada domestic lounge is usually right across from the gate to YTZ and I always have time to visit with 60-80 minutes to connect no problem, and given how lightly loaded the plane is to YTZ I tend to show up about -15-20 to departure with the plane just starting to board.
They scan my Swiss J boarding pass stub for entry into the lounge at YUL no problem.