Frisket kit: Lukas Artist Watercolor Masking Fluid with Rubber Cement Pick-Up Nib Your complete watercolor masking kit Lukas Watercolor Masking Fluid helps mask clean areas of your watercolor masterpiece before painting Then use the included rubber cement pick-up to cleanly remove the liquid frisket/masking fluid from your watercolor paintings The nib allows you to remove friskets without damaging the paper underneath Try the rubber cement pick-up and you'll wonder how you ever painted in watercolors without one!