I demonstrated this card at my last card class, on how you mask off the area with tearing up post-it notes and then sponging the area with layers of colours and then randomly stamp over the top with darker shades. I love the new note tag punch too and I teamed this up with a mini peg.
Stamp Set: The Open Sea, Well Scripted (retired)
Ink: Chocolate Chip, Early Espresso, Crumb Cake, Soft Suede
Cardstock: Soft Suede, Chocolate Chip, Whisper White