I have a silver plate razor from very early 1900’s. Before I got it no idea how like it was tarnished but it was black. Polished it up used it a few times and then put it in the case for 14 years. When I went to use it it was again black. No harm done in the 120 years it’s been around.Okay. A layer of oxidation will slow the oxidation process. Seems kinda oxymoronic. It’s like saying rust prevents rust. But I am aware that over polishing is bad too. Hence my dry wipe remark. Shiny bands are my preference but I’m not a zealot about it.