Sides are painted a translucent white and the painting is finished with a light protective spray for a mostly matte sheen. Signed on back and side. View slideshow images and video of this piece, as well as images of the 11.5 foot x 26 foot x 2 inch painting it became for a beautiful lobby renovation in Brentwood, CA, via Now Art public art agency. More details on that process can be found on the News page.