i know im replying to an old-ish post but i figure its worth mentioning
4:23 PM - Bushido: there is no possible way that a factory or even a human hand
4:23 PM - Bushido: would have enough manual dexterity to hit the inside of the eye slits or behind the teeth with paint
I mean the general idea is right but you severely underestimate human dexterity.

This forgeter is maybe 4-5cm tall (about the size of a lego minifigure, but proportioned differently) and painted entirely by hand, so yeah. A human hand could have the dexterity to hit the inside of the eye slits or behind the teeth.
The helmet wouldn't look factory-produced or anything, but it would look like a custom piece that somebody made themselves. Which is sort of what he's making in the first place.