MIG2250 AMMO POWDERED OXIDE AMMO's new U-RUST range is a new formula designed to create rust effects on your models. It is not regular paint that simulates a rust finish, but an actual oxidation process, and it would be very difficult to get a better result than easily achieved with U-RUST. AMMO has managed to adapt an ordinary chemical reaction to our scale models. Metal micro particles. Ideal for mixing with water or with other references from the U-Rust range. Provided in a convenient 35 g (1.2 oz) container.