Skins

Skins are alternate designs for cars. They are currently unreleased, despite being first announced in 2013. The majority of skins are accessible in the Nitro Type source code. It is unclear how skins will work or how they will be obtained. In the past, they have talked about how skins would be obtainable by racing with a certain car enough times to "level it up" and obtain its skin [1], or buy the skin directly from the dealership. On the Nitro Type Discord server, Travis shared a gif that suggested that skins would be able to be selected when painting a car. However, skins of cars have been released through seasons.

The skin preview shown by Travis.

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Criticism
Because of how long ago it was first hinted at, many players have shown their disdain for the developers not keeping to their word. Other players do not even want skins to be released both due to their thinking that skins already technically exist in the game (as seen in event car variants) or their opinions that cars are already satisfactory with their current designs.