Actually this photo is not for cosmetic, otherwise the requirement would be more stringent. The intended media is for catalog and standees, with possibility for wall mural print.
My typical finalised photo would have approximately 15~30 layers utilizing a variety of surface blur, smart blur, textures, curves, saturation, dodging, burning, sponging, cloning, multi-layer unsharp mask, just to name a few :sweat:
As for how to do that precisely... I think I need to write a small handbook to explain :sweat: