Sign defaced? Don't replace - reface!
We went to work using a digitally printed wrap film, with a graffiti-resistant clear film protective overlaminate. The entire cabinet was wrapped with matching color; on the faces the "push-through" letters and logo were removed, and the face wrapped with the new material and trimmed to allow the letters back in. The push-through graphics had color and white vinyl facing - that was removed, the letters and logo cleaned, and the same graffiti-resistant material was applied. They were then reinserted into the face and attached.
A successful project, for a sign that will provide many more years of service.