This is not my doing, but it is a great product to
restore your dash knobs to original appearance.

For more information see:
www/pensburymanor.com/pensburymanor/Pensbury_Garage.html
Also see videos on Bakelite radio dial knob restoration here:
www.youtube.com/watch?v=UDeE48dVyTw - 6:44
www.youtube.com/watch?v=H24lO63cueM - 10:33