[codefox1]

Have had some success cleaning the mildew from knobs with a toothbrush and mild detergent. If on sets that are not used much, paste wax and a little buffing improves appearance. Regardless, if in a humid environment, it'll grow back sooner or later. Most bakelite and other thermoset materials are only shiny on the surface. Abrade this and it'll not shine again. Yup, you can always use paint or laquer with/without bondo on "basket cases" Pays to clean out the center hole, and if fittted with a spring, remove and clear of rust and crud, then put the spring back. Same with set screws. Best!