https://www.hobbylobby.com/art-supplies/painting-supplies/watercolor-painting/winsor-newton-colorless-art-masking-fluid-medium/p/6355
Colorless Art Masking Fluid Medium is a colorless liquid for masking areas of work needing protection when color is applied in broad washes. It is specifically...
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https://www.domestika.org/en/blog/4654-learn-to-use-masking-fluid-with-watercolor-paints
Painter Ale Casanova teaches us how to create interesting effects with watercolor paints and masking fluid Leaving areas blank when painting with watercolors...
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