After I had my piece all glued together, I took it out back to spray. In retrospect, spray painting it in this manner was not fun. Raw cardboard toilet paper rolls absorb so much spray paint that you have to do a zillion coats before you see full coverage. Also, you're trying to get in and around all the surfaces of waaaaaaay to many little circles. Next time, I'm going to paint the tubes with acrylic BEFORE I glue. This was really the most frustrating part of the project... other than the time my glue gun went rogue while I was trying to balance the piece I was about to glue on and catch the falling piece... Yeah... not fun. All in all, though, I LOVE LOVE LOVE this project.
My final piece isn't exactly "final" yet, because I'm not home to hang it on the wall, but this is what I have right now.
Have you ever done something surprisingly beautiful with toilet paper rolls?