Use Wilton's Editable Metallic Cake Paint Set. There are 5 metallic colors: gold, red, silver, green and copper. You can use them on their own or blend 2 or 3 together create almost any shade.
Total net weight: 2.5 oz. (71 g)
Quantity: 5 jars, 0.5 oz. each
Made on equipment that also processes milk, soy, wheat, peanuts, tree nuts, fish and shellfish