This tool is ideal for fabric painting, drawings, signing artwork, making perfectly consistent dots, line art, and French matting. You can use this pen with acrylic paints, watercolours, oils, or ink. Thin the paint to a watery consistency. Fill the pen using your brush tip loaded with paint. Hold it like a pen and draw evenly over the surface, allowing the paint to glide gently. Clean the pen thoroughly after each use with the enclosed cleaning plunger and soap and water.