Added some texture to the piece, by heating with a heat tool until some small bubbles appeared.
Then added a light top coat of dark patina acrylic paint. I like how it looks like distressed metal:
This piece is black paper that I had brushed on left over Perfect Pearl washes when working on other projects (I don't like throwing out left over washes or paints):
Used the same die to cut out the shape from this paper and the under layer with plain black paper and glued the two together:
Found a scrap from a Worksheet Wonder paper: