Will definitely lay them out, put some light gray registration marks, etc. Then spray. Have to cut them to 3"x4" and then mount, however. Can't mount them and then cut, because client really needs the canvas to wrap around the edge. End product should look like a tiny stretched canvas, although I'm planning to just miracle muck to 1/4" wood (has to be wood, client does not want foam board), wrap around the edges (also miracle muck), then just cut the excess off the corners. My prototype looks perfect. Was just hoping someone had a more automated system.