I have a 1919 dealer manual with all of the specs for the touring car (and all of the other models they produced that year. If it's helpful, I can send you pictures of those pages.
Here's what it says about the body:
"The blue black finish is all paint and varnish - not baked enamel. We like to emphasize that point. The lustre has a depth and smoothness that can be acquired in no other way."
Here's what it says about the wheels:
"The more exposed sheet metal parts, such as the fenders, dust aprons and gas tank, are black enameled and the wheels are painted black, completing a harmonious color scheme that is very practical and durable without being somber."