Sorry about your family's loss, Love your wife, "like" your guns.
I had a friend come by with a similar situation, she was cleaning out her Father's truck and found a 19-6 in a leather holster, she said she tried to remove it but it was STUCK! She knew nothing about guns and was afraid to pull on it. Everyone here will wonder so I'll say yes, I over paid her in their time of need. The bore and chambers were bright, sharp and shiny. The cylinder, muzzle and area up the rib around the front sight were the problem areas. I knew the pits weren't going to polish out but the active rust had to be stopped. MOST polished off with oil and a rag. On the heavy areas I used a styrofoam fingernail polishing board (yes! I've found they work great on old guns) with plenty of oil of course.. on the REALLY heavy areas I used 3000 grit wet or dry, again plenty of oil. As everyone may imagine I had to go to WHITE, in the worst areas. Perfect? No, the outside never will be! But it shoots PERFECT