A water displacing aerosol like Pocket Rocket or WD-40 will also stop things from rusting until you can dry them out properly.
I found an old pillowcase, with the component to be dried inside it, fastened to the nozzle of a hair dryer with a rubber band works wonders, as you aren't heating the entire room just to dry a floppy drive out.
You may be pleasantly surprised at what may have survived, I have known an A500, left out in the rain for months in a back garden, come back to life once cleaned and dried.
WTF
