Joyce DoddHarcharik Hi Joyce, this is Bob from the Casa. Tom almost always uses a flat brush and prefers to also use natural hair brushes, sables and Kolinskys as they hold the maximum amount of water and pigment without having to reload. As you can see from the demo it is all done with a flat held at different angles. Check out some of our other videos and our website www.artworkshopvacations.com