Something else to think about is to use a GOOD dust mask when sanding off rust. Or, at least, cover the back of a box fan with a furnace filter and set it nearby. (The better the filter, the more of those particles will be removed from the air.) The fan will pull the dust laden air away from you. A respirator, with appropriate filters, is even better. They're about $30 from home improvement stores.
Breathing those rust particles can't be good for you, either.
Just a thought that may be useful to someone.
Lee