Cars in Nitro Type can be painted in the garage for 15% of their buying price. Including the default one, each car has 36 different paint jobs that maintain the color contrasts that were in the original paint job. Because of this, neutral colors (such as black, white, and gray) cannot be painted to be as visibly different from the original as other colors can. This means that the Shadow XMaxx Tree does not change color upon painting, and is also the only car on Nitro Type that does not change color.
There is a glitch in the game with many cars (without the default paint job of red) where if you paint the car a certain hue of red, it results in glitched pink particles appearing all over the car (with varying intensity and patterns depending on the car).