Well when you started this thread you got me a thinking about what was on the wall out at the college body shop. So tonight I took my camera with me to class and this will cover about a third of it. I don't know the age of this stuff but the college opened in 1968 or there abouts. If I remember I'll take more next week.
Well I took the camera back out to auto body class tonight I took some more pictures of signs on the wall and back in the tool room. Some of the things there are two of each this is the reason for what looks like the same pictures. Mitch
Ditzler was a big player in auto paints for most of the last century, but finding a sign in good condition from them is much harder than DuPont auto paint signs. Most older DuPont signs were porcelain while all Ditzler signs I have seen are painted tin, except for the electrics.