Julia Quinn and I used it for a few workshops last month.
The technique is a variation of faux mother of pearl. Onto glossy Stampin'Up! card you stamp your image, punch out the shape and then with a scrunched up piece of cling wrap that has been lightly dabbed into a puddle of shimmer paint (frost white), lightly dab randomly over your stamped images.
The edges of the punched squares were sponged to add a vintage feel to the card.
Stamp sets - The Open Sea, Natures Nest, Happiest Birthday Ever
Inks - Cherry Cobbler, Soft Suede
Card - Soft Suede, Glossy White, Very Vanilla
Embossing folder - Framed Tulips
Mini silver brads, square punch 1.25 inch, Big Shot
Below is a version I did using Natures Nest and Nature Walk.