For non-USA flights NoS scanners are only used as an option to resolve alarms from the WTMD.
Laptops out, Kippy bag out, shoes & belts stay on.
Overall CATSA is "better" then the TSA. Even for US bound travel when I was selected to for NoS everyone was annoyed that I opted out but remained very professional.
Also - the new TSA "standard" genital grope pat-down does not exist in Canada.