Posca

Uniball Posca are the ultimate paint markers allowing you to paint with the convenience of a marker!
Each marker is filled with an opaque, water-based acrylic paint that is non-toxic, fast drying, lightfast and acid-free. These markers will bond permanently and waterproof to porous surfaces such as paper, board, fabric, timber, clay, plaster and most other porous materials. They are removable from non-porous, sealed surfaces such as glass, metal and plastic.