I used a dark chocolaty brown to spray on dry all over the bomb, this was its base colour. I then mixed up a more ready brown colour to spray on certain areas to give definition and a more depth look to it. Then I mixed a orange brown to spray all over here and there it helped blend in the two colours before. The last colour I mixed was a very light brown. I mixed more thinners in to this colour because as I sprayed with it, it would trickle in to very small places and gather like rust would in areas. With all the colours i used I made sure I mixed matting agent into them as I didn't want a glossy finish.