A wood sign is not going to last very long as as a masonry sign, but are much more.
Using the wooden cuticle stick, gouge out carefully any grime you see in crevices and corners. The time came when these signs were melted for scrap during Ww2. They don't have with regard to you read pages of points. https://Www.provenexpert.com/magenta-signs-doncaster/