If you use anything with water in it, you might as well tear down the entire car and lube everything.
I don't car how much air pressure you use, water will trap itself between the hinge pins and arms, bearings, and anywhere else it wants to go. I've cleaned cars before using simple green, washed it with water, blew it off with 150+ psi of air pressure, and when it came time to change an arm or something, I found the hinge pin had corroded and bearings had seized up.
Ive found that either brushing it off dry or completely rebuilding works best for me.