This butterscotch square button tested positive for Bakelite. I polished it just a tinge, but I'm fine with a thin layer of grunge on old buttons. Is that gross? To me, if something is an antique it's allowed to have a patina or a faint bit of historical residue in its hard-to-reach places. Nothing escapes the ravages of time, right? At any rate, in my eyes this vintage square is a flawless treasure.