To my horror the day after my first straight razor shave I noticed small red rust spots on my blade, I was positive the blade was dry and kept out of a humid spot, I hadn't purchased any mineral oil yet but i didn't think it could happen so soon. Could use something like Brasso on my blade, it says it's ok for brass, copper, stainless, chrome, aluminum, pewter, bronze; but it says not for use on silver, lacquered, painted or antiqued-finished surfaces. I looked up the msds (material safety data sheet) for it and all it contains is petroleum products, silica, a type of clay, oleic acid, and ammonia