What are the best brushes for rock painting? You can use any brush to paint rocks (and I have many) but I keep returning to the same three brushes - stencil, script liner and flat - for most of my painted rocks. For me, it's the shape which makes these brushes my favorites and not the brand or material. (You're better off not spending a lot of money on rock painting brushes because the rough surface of the rocks wears away the bristles.) Script Liner Brush Good for: Outlining Detailing Fur…