Having never worked on restoring an old image I didnt and still dont have a clue where to start so I improvised. lol
duplicated, converted to black and white with a green undertone. adjusted the contrast up to 30. This is where I cheated cause I had been very carefully trying to use the blemish tool and thought what if i use the noise removal tool? I did and it really smoothed things out. Burned the white areas, sharpened the faces up (I think I did too much) went around the edge with the burn tool set on 30 opacity and shadows. and then went around the edges with the soften tool set on 45 opacity.