I've wondered about a small "balloon" or something similar that would fit in the keyway? It'd have to be pretty small, but that way you could use a squeeze bulb like one of those turkey basters, and just squeeze and let it go as you apply tension. My problem is getting something like that into the keyway.
Or maybe just a bulb that could provide the air pressure like the air compressor?
I think the pressure washer would have some lasting damage effects on the lock. I also don't like it because it'd be a lot messier.
