In Reply to: Preventing Rust on Fan Blades posted by pezza on Saturday, 14. February 2009 at 09:31 Bali Time:
humid or coastal environment, nothing is maintenance free.
I agree with the suggestion re- stainless blades, but I would still be inclined to give the blades a wipe every so often, probably using a decent grade of car polish or anything with a silicone base for additional protection.
Good luck with it.