My wife has “Zen” diffusers all over the house. I can not turn these “on” with a Smart Plug because you have to manually push buttons on them. However, I am able to turn them off via Smart Plugs. I have a simple rule that say’s If Diffuser turns off then turn on. This allows them to be ready for use the next time she Zens the house.
Point of story is, using a SmartPlug, you can simply plug the printer in to a Smart Plug and then turn that Smart Plug off when you don’t want anyone using the printer. If your printer is like the many that I’ve had, they typically have a button on them to turn on. So if you kill power then turn power back on, you have to hit a button in order for it to turn all the way on. Or…like yours, you can Wake it up via LAN (WOL).