Originally posted by StarTroop He seems to be using some sort of weighted lever to stabilise his arm for those long movements. Still, it's super impressive how he angles the brush to finish those lines that taper off into points.
It's know as a Mahl Stick. Traditionally used by artists and sign painters is usually a 1 meter stick with a ball pad on one end.
What is a Painter's Mahl Stick?
If you've ever seen a movie from 30s-50s where someone is painting the name and title on an office door (usually a newspaper office - "Meet John Doe" comes to mind) the painter is almost always using a Mahl Stick.
Besides steadying the hand it also prevents you from inadvertently touching and smearing the artwork below.