[twooldfarmers]

If you get an alloy or steel rim that is badly corroded from winter salt intrusion or from sitting flat for long periods of time just Emery the bead mounting surface. Apply a liberal bead of plain ole' silicon to the tire bead and reinflate. Works and works forever with no safety issues whatsoever.
You can do this at home with a jack-all / farm Jack and a can of ether starting fluid if you don't have a Harbor Freight tire machine.