Cleaning a rusty vice

Bought an old Dawn No.7 vice for my new bench. It needs a good clean and has some surface rust on the rods, screw and quick release mechanism. What's a good way to go about getting rid of the rust ? Preferably without taking the vice apart.

If I were to soak the whole thing in citric acid and then hose the solution off, would a wipe down with WD40 be sufficient to lubricate it all again ? I've soaked things like chisels in citric acid but never anything with moving parts.

Thanks in...

Source: http://www.woodworkforums.com/f213/cleaning-rusty-vice-133412/

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