STL by Wicked, you can get it here: https://3dwicked.gumroad.com/l/TonyStarkS
(And check out their other models, they are amazing: https://www.patreon.com/3dWicked. This is not a sponsored video :)) I'm just a huge fan of their work)
Painting tutorials:
1. Short how to mix your own realistic skin tones: https://youtube.com/shorts/Pa1HpkBeg-E?feature=share
2. Detailed tutorial for painting male skin tone: https://youtu.be/d9tNoXisoWs
3. Short how to paint brown eyes: https://youtube.com/shorts/Zeiz-0C4OYI
3. Detailed tutorial for painting eyes: https://youtu.be/QEdpzWekayQ