I achieved this glorious background by squirting several different colors of Createx Metallic paints onto a piece of acetate (any non-stick surface works) and then brayering thru it until brayer was loaded. Then brayered over some glossy. Be sure to wash your brayer off before paint sets!
After it was dry I trimmed and layered and stamped the focal image by Club Scrap and attached.
Isn't it colorful? You get quite a lot of texture with this also.
I got a couple pcs. out of this although the second one was a bit lighter in color.