This is exactly why car ceramic coating has moved from a niche detailing service into something a much wider range of car owners now treat as standard practice. What Is Car Ceramic Coating? Car ceramic coating is a liquid polymer applied directly to the exterior surfaces of a vehicle. Common Misconceptions About Ceramic CoatingAs ceramic coating has picked up popularity, a fair number of myths have gone with it. Car ceramic coating has caught on because it deals with a lot of these everyday problems directly.