I would print selective split grade: a soft grade base exposure through a diffuser (black stocking, diffused plastic, etc.) the effect can be varied depending on how long you put the diffusing material into the light path - try half the exposure first; followed by a subtle burn in at a harder grade using an aperture in card for the eyes and mouth - don't forget to jiggle the card slightly even for such small areas. Hopefully, this will reduce the skin lines and retain a pleasing look, though it will take several attempts.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2