Despite warning about keeping guns in a slip case inside a safe, I never had a problem. A GoldenRod is inexpensive to buy and operate, and keeps everything inside from rusting. There is no need to drown a gun with oil to prevent rust when a very thin film and the GoldenRod will do nicely.
Geo, a burglar gun or two or three is something that should never be locked away. It should be locked and loaded and ready to go. Precautions should be taken to keep them out of reach of children. Most importantly, children should be taught what to do and how to react if they ever come across a gun, or if one of their playmates or siblings even goes near a gun. Even if your guns are securely locked away, they may come across one in the home of a relative or friend, and should be trained to absolutely not touch it and immediately tell an adult. I'm sure you here all know all that, but someone who just visits and reads threads occasionally might take note. Public Service Message from the NRA.
I trained my kids as soon as they could walk and understand simple instructions. From time to time, I tested them by intentionally leaving an unloaded revolver or long gun in the bedroom, and sending them in to get something for me. I used a revolver or double because it is so easy to be 100% certain there is not a round in the chamber or cylinder. They never failed to come running to say "Daddy, there's a gun on the bed dresser, or floor." I then always reinforced that behavior by praising them for being so smart and taking them out for a fun meal or a new toy. As they got older, they knew that guns were not forbidden fruit, and they could shoot one anytime. All they had to do was ask me. I got similar training from my Dad, and it worked. I won't say I was never tempted to shoot a gun when he wasn't home, but I also knew that the consequences if he found out would mean I wouldn't be allowed to shoot, hunt, or even touch one again until I was... I don't even want to think about it!