I carried blued issue guns on the job and I have a model 36 I carried in a boot as backup and in a pocket as backup for years. The finish is badly worn from all the rubbing and use over 40 years. It also went on many hunting trips just as an extra gun where big handguns just took too much space and too heavy, since a rifle was primary.
Lots of sweat on that gun from the boot. The only way to keep the wear and rust down is to empty the gun, spray it down and oil it, often.
Today, I have several and have revised my care. First, I use Ballistol now and carry a can in the truck. Anything that get sweat or wet gets an immediate spray down. I also use it for cleaning. However, for a deep clean, I get the gun totally dry using alcohol or starting fluid. Then wax, I use Ren Wax now but agree, Nufinish is not wax but works fine. Johnson Wax is also wax and works fine.
I also agree with grease on the inside, wax on the outside. Take the side plate off, clean it with anything, add a tiny amount of grease , I use that Wilsons now, expensive but it takes little, close it up and wax the outside. Forget about it unless it gets sweat or wet.
Holsters matter. Never put a blue gun in a plastic holster, they will scratch. A lined leather holster is best for a blue finish, but even leather needs a little treatment now and again. Nylon is soft and fine, but it can hold moisture.
I am also in that camp of spraying the gun a tiny bit just 1 second before it goes into the holster, just do not get anything on the primers. Again, I use Ballistol for that.
Or as many say, carry the stainless or luminum guns like my 637, while the 36 stays in the safe, but I do understand why you want to carry it.
