Painta Clean can be used to clean your brushes after using enamel paints. Each 100ml bottle retails at $5.99.
Color Mix is a thinner that can be used for airbrushing. Each bottle is 100ml and retails at $5.99.
Great for precise measurements, Revell's Pipettes Set comes with 6 pipettes that each have a ml scale. Each bag retails at $3.99.