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We tested the Iridescent Medium by Winsor & Newton! Mixed with watercolor and applied over a dried wash. We prefer to mix with watercolor to have a more natural look and flow. You can find it here: The brush br Raphael: Winsor & Newton description: This medium gives pearlescent or glitter effects to water colours and is particularly effective when mixed with transparent colours especially over dark backgrounds. - Mix with transparent water colour or apply over a
