FAQ: What brushes do I use? I use flathead size 10 or 3/4 inch when doing my black lines. I don’t use any special brushes, typically I buy a 10 pack of various sizes that costs $14, the brand name Donna Dewberry. As you can see in photo a lot of these brush tips are ruined.. I’m not sure if it’s because they are cheap brushes, or I because I don’t properly clean them, or because I use them so often. Maybe a combination. Also I use the ends of my brushes to mix paints, pretty much destroy all my brushes so I prefer to buy cheap ones. I do have one $35 brush (not pictured here) that I’ve saving for a special occasion to use.