". . . and Push"?

UPDATE: I just Googled the text of the [1910?] wall advertisement and found this possible explanation for the obscure message on Forgotten New York

This sign had been a mystery to me for some time. Forgotten Fan David Hall submits a column from the May 27, 1994 New York Times which clears it up. Apparently the sign is an ad for outdoor advertising, an ad for ads. In the phrase 'Brush Up Business with Paint, Paste, Paper & Push', "push" means "sell" and is here for alliterative purposes. A little awkward, but copywriting has improved since, we think.