The most striking examples of automobiles have always been a blend of function and style. Chrome was introduced to automobiles via the chrome bumpers of the 20's. Being constructed of spring steel, a more durable/cleanable surface was chrome. It was also more expensive, as is today.
Since it worked well for durability, it was a sign of concern for "quality."
After time, it became synonymous with wealth as well. Chrome on cars, when done tastefully, was the Mark. Henry Ford chromed the radiator shroud of the T in 26-27 as a failed attempt to exude this on an otherwise "cheap" car.
Chrome was used on well used surfaces such as radiators, grills, oil fillers, and wherever the paint of the day would quickly scratch/chip/peel.
As muscle cars came into being, aluminum was introduced to attack the war on HP/weight ratio from 2 fronts, and, as with chrome and quality, aluminum became synonymous with performance. (Carbon fiber is the new entry into this phenomenon).
De-chroming is also becoming qualified with performance. Although a very durable surface for wiper arms, it also hinders visibility. Who wants extra glare while going 100MPH?? It is also about weight reduction now possible with todays plastics and coatings.
In closing, to me, it's all about what you are trying to accomplish. Hot Rodding has, and will always be, the art of updating an otherwise obsolete car, or pushing the envelope of technology. If that is what you intend to accomplish, stick with a common theme.
If you are building / restoring a vintage racer, carbon fiber is a no no. Raw aluminum is in. And correct PERIOD parts are a must. An original Grand Sport would look stupid with carbon fiber.
If you are restoring a Rolls Royce, make sure it's triple marine chrome.:drink: