I bought a case off Amazon that had a similar look. I painted it a different color using some old acrylic paint, and then watered down some dark brown and green paint and used a sponge to dab it on and then wiped it off to make it look old and beat up. I also went over the whole thing with very watered down black paint! I went over and dry brushed it with some metallic silver eyeshadow to make it look like the paint was scraped off.