Once the rust is cleaned off, you have various options to refinish it. You can buy blueing kits to use at home, have a gunsmith re-blue it, or send it to various companies for Cerakote, Duracote or Hydro-dipping. There are various pros and cons to each. Good Luck with it.
Considering the shape it's in, you should probably have a gunsmith check the internal lockwork and make sure it is safe to fire and functioning okay. Revolvers must lock-up properly to be safe to fire. Lock-up referring to the alignment of the cylinders with the barrel when cocked and ready to fire, in case you didn't know.
Considering the shape it's in, you should probably have a gunsmith check the internal lockwork and make sure it is safe to fire and functioning okay. Revolvers must lock-up properly to be safe to fire. Lock-up referring to the alignment of the cylinders with the barrel when cocked and ready to fire, in case you didn't know.