Now a golden oldie:
Original Broadway Cast Recording: Peter Pan, LP mono 1954.
Starring Mary Martin.
This one is pretty dirty i.e. noisy with light spots of mouldish no sheen at spots.
But she has a great voice, and nice melodic older style Broadway tunes
Composers are a mixed bag on this show, by Jules Styne, and Comden&Green, as well as Charlap, a relative unknown.
A clean up is warranted.
I will give it a full 'spa' experience overnight, to cleans up well
Lay on a flat surface, lightly mist with distilled water to soften up the dirt bit.
Wait 10 minutes.
Then apply a bead of PVA wood glue on the surface, and spread evenly with the edge of a piece of cardboard.
Take care to keep glue clear of the center label.
Leave to dry overnight.
It will be clear once dry.
Peel off and the gunk deep in the grooves comes up with the glue.
Listen, and if it sounds materially better, repeat on flip side.