Has anybody ever seen a Sterling sign like this? Could it just be a over paint of a regular Sterling Gasoline sign? Pic is dated late 50s.

This was a legitimate sign/logo from around 1960. There is a plastic variant that appears in a Walt Wimer photo in the Pennsylvania chapter in my book, One Hundred Years of Gas Stations. I've never seen a metal, be it painted or porcelain, version, though.

Thanks Wayne,I have the book I will check it out.