Ghost Signs on Cleveland Buildings
Nice article by Marcia Pledger in this morning's Plain Dealer about old signs on the sides of buildings, harking back to Cleveland's industrial heritage. They are called "ghost signs" and I see at least a couple in Cleveland Memory, such as this great one about Eliot Ness.
We'll have to consider this as a category to add to Cleveland Memory.
That said, there is an organization interested in such signs, called the Society for Commercial Archeology and there's also various Flickr groups about ghost signs.