A good oily cloth is a thing of wonder. My late father had a large piece of tobacco brown silk as his (very very lightly oiled) oily cloth. Lint free is silk. Kept in the table drawer in the gunroom. It was always used to give a last rub along the outside of the barrels of his shotguns when they were put away to remove any fingermarks. As such fingermarks can cause rust.
The charity shops of the UK will now be filled with SD members seeking women's plain colour silk headscarves this next few weekends.