I was browsing through some old BattleTech stuff today and came across a site called Camo Specs, dedicated to painting miniatures for BattleTech. Of course, as far as techniques go, some things can cross over into other genres, which is why I'm posting this in the Scale Models board. Check out the Tutorials section of camospecs.com, or just go straight to
https://camospecs.com/articles/how-to/how-to-painting-a-clan-wolf-scheme/ to see one featuring my favorite mech and faction.