I just had a new s&w m29-10 have one little pitted spot why I'm not sure if I over looked it when I purchased it used unshot. Luckily it wasn't that bad and some careful restoring it with cold bluing I saved it. I keep it in its orginal s&w blue case in the safe. But the parchment paper was worn.
I had some Russian parchment paper sitting here. I oiled up the guns and wrapped them in New gun parchment paper while they are dripping wet with oil. Back in the s&w blue cases they went.
I never in 40 years ever had a gun rust on me. I need to inspect used guns closer from now on.
The s&w m29-10 w/ 6 1/2" barrel in blue was nib, still unshot with the papers, blue plastic case and a new presentation case, in the used case for $699. I bought a new s&w at a used price. The gun is awesome.
I just packed all my s&w handguns dripping wet with new Russian parchment paper. I hope this works. I do have some handgun sized open on one side plastic bags I may wrap them in too besides the parchment paper for long term storage. Maybe cosmoline would be the stuff to use.