Hi-Res Fix, ADetailer or FaceDetailer recommended. Previews are generated using Hi-Res Fix (1.5x) with denoising at 0.25 and Remacri.
v1.0
Only trained with orignal depiction.
Optionally, using retro artstyle, 1990s (style) might help reproduce the classic style.
In that style, his nipples are not very obvious (only areola), I'm not sure how to solve this either.
In that style, sky and overall scene might appear gloomy, which is just resembling the original.
By default (not using it) it gives a more modern vibe.