first, stick on scraps of paper all over the atc
next, when the glue is dry , use sand paper lightly and scrub away some of the pattern and around the edges, then add some brown ink and another colour or two
next add a couple of stamped images in black, with one or two, press really lightly so only part of the image comes out
Lastly, choose a simple stamp and apply some gesso with your finger to the stamp surface and stamp once over atc wipe stamp immediately with a baby wipe and get iot completely clean. white acrylic paint will also work Have fun!!! 
