Is ther a way to apply a transparent sheen to fabric?
I am building a costume that involves a few pieces with feathers. Instead of using real or faux feathers, I want to make them out of cotton cloth. The effect I would also like to include is the effect on feathers of magpies, where they typically appear black except for the teal/blue sheen that appears in bright light.
While keeping the feathers soft and natural-esque looking, as well as be washable and withstand wear and tear, is there any way that I can apply such an effect to the fabric?