I think I'd do it the other way around. WD-40 to displace all the water, then compressed air to remove any remaining water OR WD-40.
I've seen WD-40 and CR-556 kill power tools before, so I'd be real cautious there.
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!