Grease to lubricate convertible top frame

What is recommended to lubricate the pivot points and sliding levers on the convertible top frame? I have not found any information in the 1973 shop manuals or Chilton’s. One YouTuber suggested lithium grease, but white grease looks terrible on a black frame. There are plastic washer/rollers, which could affect choice of lubricants.
Gary, 1973 convertible