Here's something any ID student modelmaker can learn from: Check out how this artisan at the Royal Enfield motorcycle factory handpaints the pinstripes on a gas tank:
Observe his technique closely, and you'll notice his right hand—the one holding the brush—moves through space as propelled by his entire body, but it barely ever moves in relation to his body; he locks his hand, arm and torso into a particular shape and keeps it there, using his legs and waist to create slight but precise motion. He then manipulates the tank with his left hand as the brush makes contact. This is like holding your paintbrush steady and moving the canvas around beneath it, and even more impressive because he's doing it in 3D space.
I've watched the video over and over again, and I find it mind-blowing. With those hands and a different roll of the dice, this guy would've been a neurosurgeon.