[Walt Fricke]

If you strip the threads, but don't have a machine shop in your plan, you can try cleaning up the stud end and welding a nut onto it.

While one would think such a stud might be ready to snap, at that point it ought not to matter - if the welded nut approach works, problem solved. If it results in a broken stud, well that's where you are headed anyway. The welding might also do a decent job of heating the stud to loosen the rust to aluminum bond.

Walt