bad choices, rust on crank...

Me being my lazy self I left my freshly-polished 360 crankshaft on my garage floor sitting on a bunch of plastic bags for the past six months or so. I didn't plan on letting it sit for that long or else I would've lubed it and wrapped it in a plastic bag (obviously plans changed), but now there's some surface rust on one of the rod journals. Can I get it cleaned off without too much trouble or do I now need a new crank?