Should the parts you're trying to color need to be painted rather than foiled, a few colors to consider for brush painting. Tamiya X-12 Gold Leaf would give you a color as the name implies and with a dash of Smoke to detail would resemble a Carb. with a gold finish. X-31 Titan Gold is a much lighter shade but with a metallic finish. X-33 Bronze is a darker brown metallic finish. X-34 Metal Brown is a little lighter shade than the Bronze color and is still a metallic finish. I always look at the bottom of the paint jar before buying since it will give you an idea of what the color may look like based on the pigment settled on the bottom.