What bugs me is that back in good old days (at least in the US) I would go to the hobby store and buy a bottle of Pactra "flesh tone" and be done with it.
Pactra was enamel paint and their "flesh tone" was the go-to base color. Just mix some with a tiny amount of "whatever's on the shelf" red for the lips and mouth area. Mix a tiny amount of "flesh" into white paint for the eyes then use the flesh tone on its own for the rest of the face and skin as a base color. Done and sorted.
Pactra went extinct sometime in the late 1990's and no one picked up their formulas.