Generally most sign shops don't worry much about the back side of signs that they make. At most the back side might get a coat of primer and occasionally a matching color to the front. We take a different approach. We finish the backs of our signs with as much care as the front. In our shop frames and mounting brackets are laminated inside the sign between layers of Precision Board. This reduced clutter in a hurry. If the sign is single sided we will at least texture the back and paint it the border or face color as applicable. Many times we do even more than that. Signs almost always show from the back at some angle on the property. One of our current signs is a good example. Everyone will undoubtably notice the sign from the front as they approach the theme park attraction.
While we could have probably gotten way with doing a flat back side on the sign I knew it would look ten times better finished all the way around. There was no need to put the lettering on the rear of the sign and in fact lining up the two sides of the lettering wouldn't have worked out without a panel behind the lettering. But a little extra work on texturing and painting along with some fun details like the hollow hub and prairie dog tail add a whole lot of interest in a hurry.
This extra effort instantly takes the sign over the top and in fact is the type of thing that separates our work from what most other shops might make. This extra attention to detail also allows us to charge premium prices for our work. That is simply good business.
-dan