It looks finished to me--I really like the gradations from light to dark in the different sections.  It's really beautiful.

 The only suggestion I have is that the magenta/gold colors are not carried into the darkest panels on the ends, which are only blue and purple--so the jump from the inside panels to the ends is more distracting than the others--you notice the line more.  If you added some very dark magenta & gold into the two bottom corners, it might be a more natural flow from one section into the next.