The American Sign Museum (ASM) (www.americansignmuseum.org) has been compiling information about signage-restoration projects throughout North America. ASM Founder Tod Swormstedt touched on these initial efforts at the National Signage Research & Education Conference held at the University of Oklahoma on October 10-12, 2015. Future possibilities include a group and/or event devoted to sign restoration.
Lisa Peterson, the marketing manager at Federal Heath, a 115-year-old sign company headquartered in Oceanside, California, wrote about this on LinkedIn.