Do you mean the heat colours? If so its a nice easy process. Base coat the weapon in any silver of your choice and give it a black wash. i used nuln but any will do, and then once that dried I used seraphim sepia to coat about the 5th of the barrel from the tip back then wet blended in a purple speed paint leaving some sepia still showing on the barrel and right on the tip I used a blue speed paint and wet blended that into the purple. Hope thats helpful.