This set contains everything necessary to do great realistic effects on any type of engine or metal objects, such as tank tracks. There are two colors for the engine, for effects of dirt and grease, which can give an unbelievably realistic finish. For the metal objects and tracks they have designed a wash, a dark rust colored pigment and a super metal colored pigment, which has no equal. This steel colored pigment is very bright when you rub it, the more you rub it the shinier it gets. Also this ultra fine pigment does not contain metallic particles as you would normally find in other products on the market. Achieve a realistic steel finish like you have never seen before.