The dynamometer has a braking torque regulator-the Power Absorption Unit (PAU) is configured to provide a set braking force torque load, while the prime mover is configured to operate at whatever throttle opening, fuel delivery rate, or any other variable it is desired to test.
As such, metallic gold is a good choice for brightening neutral, nature-inspired color schemes. The trick is to pair metallic gold with warm, deep-tone neutrals, such as charcoal or slate gray, chocolate and coffee browns, dark sage and olive greens, and deep tan and beige.
Gold to gold is lower resistance and less prone to electrical noise than silver to silver even though silver is a little bit better electrical conductor than gold. If you want a surface to remain free of oxidation and corrosion in a wide range of conditions, gold is really really good.