This set contains everything necessary to create great realistic effects on any type of engine or metal objects, such as tank tracks. There are two colours for the engine, for effects of dirt and grease, which can give an unbelievable real finish. For the metal objects and tracks AK-interactive has designed a wash, a dark rust coloured pigment and a metal coloured pigment, which has no equal on the market from any other brand or manufacturer of pigment. This steel coloured pigment is very bright when you rub it, the more you rub it the shinier it gets. Also this ultra fine pigment doesn't contain metallic particles as you would normally find in other products on the market. Use them to achieve a realistic steel finish like you have never seen before.