Return to iridescent medium (thing)

Very much like the [gel medium] used in [acrylic] painting, except there are tiny [prism]s of something like fine [glitter] suspended within the gel. This is the key to making your acrylic paintings come to life! Especially when painting flesh tones. Just add about a teaspoon of this substance to every four of your actual acrylic color. This also extends your [workablitly] time and extends your color, though be careful that it doesn't make it too [opaque].