Hi, Wolfsire. Not sure if it will be more intimidating that way, but shiner.
So, to an enemy of Rome, with thousands of legionaries marching upon the field of battle, bronze belt plates gleaming, cinculums glittering, vexillums snapping in the breeze, and armor shined brightly, I think yeah, it would be more intimidating. A nice rule of thumb is if you were on the field of battle in the morning, you remained on the field of battle that night.
Just no shark's mouths for this small ballista, by Vulcan!
Scarlet and gold are very much Roman colors, and the bronze by default gives me the gold.
My biggest problem for paint ideas is trying to research ancient paint. Most folks seem to like milk paint, but I'm not sure I want to go that route. It seems very 17th and 18th century, not 1st AD. That is my impression, at least. Even in Elizabethan times, all those fantastic looking exposed beams we love now were covered up by paint, sometimes in really fanciful ways, such as to simulate stone. The Roman and Greek statues you see in museums were polychromatic, meaning many colors, not plain white marble like we 21st century folks are used to. Shields were painted, carts were painted, buildings were painted, ships were painted. Torsion machines must have been painted. That is my feeling, in any case.
Dane