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, watercolors, 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.