This post is brought to you by the letter E and the number 9. Those are the buttons I push to get a Twix out of the candy machine.
"I put my heart and my soul into my work, and have lost my mind in the process."
It's a lovely 'objet trouvé' (as quote the artist's statement), but I could get no verification that it can actually 'print' colours, as suggested by that laughing squid page. I think it's just a funky sculpture piece.
Texture overlay. I did something similar recently using an image of textured paper, put it on the top layer, and played with the opacity/blending settings until it looked good. If you want to get more...