[Tony Smith]

Most of the markings on the vehicles, such as ARN, were hand painted, professionally by a Signwriter, or Ticketwriter. Some markings are seen in photos or existing vehicles as having used a stencil, and these are kept as a basic stencil and not blocked in to form complete figures, but these are likely field or unit applied. Most Base or Factory vehicles show brushmarks from handpainting.

Seems a difficult skill to attain these days, but before the widespread availability of mechanical letterforming and printing, most commercial signage was done by hand by tradesmen (or women) variously called Ticketwriters or Signwriters. What we call "Fonts" in computerspeak today were well-practiced hand-sketched shapes that developed into an individual Ticketwriter's "signature".

Ring around some signwriting business and ask if they still have an older employee still capable of doing Ticketwriting. They appreciate the ability to "flex their muscles" again, and might be willing to take a small traditional job just for the pleasure of doing it.