The only other forum I've found as informative, productive and congeneal is thelincolnforum.net (Lincolns & Continenals of all years). Was an active member for over 10 years. Pure karma - you get what you give.
Are you sure? I thought 70s LPs had witch hats. Mine came with speed knobs but those all broke where the pot shaft pushes in. Still have them. Perhaps I could epoxy the damaged area, drill out a hole and fit them again.
You could use a polish instead but that would make it shiny.
I polished my '81 Custom one time (2011) since I bougt it (1995). Hadn't properly cleaned or polished it ever. Only a quick wipe with a piece of cloth. From a distance it still looked nice but up close it looked a bit gunky in...