Since I live in a small town that doesn't have a hobby shop, I used spray paint from Walmart and a local hardware store. I first used Krylon grey primer then I coated it with Rust-oleum flat brown on the outside. After the brown dried, I did some quick passes with Rust-olium Satin cinnamon on the outside and silver on the inside. Finally, I used acrylic paints for the orange rust and black weathering.