Add images to the card with gel medium. Bernie used several images, placing some over the string. I wanted to use this image and wished I had added the yarn covered gesso afterwards, but I was able to get the image under the yarn. Bernie recommends softening the edges of the images with gesso, I achieved a similar look by tearing out the image I used.
Paint the card with washes of color. I made washes by adding acrylic glazing liquid with a mixture of acrylic paints. Let dry.