Holster wear solutions?

[Ray K]

I've got a very nice 1936 S/42 and want to pick up a correct holster for it. The question is, if I store the gun in the holster, how can I prevent additional holster wear to the gun finish from inserting and removing the pistol? Can I just wrap the pistol in a thin oily rag or some other kind of shield between the gun and the leather?