From all I've read about it, it's no different than any ceramic coating. Do you know how long it's been on? BUT if it were me, I'd clay it, polish it, and then just use the Graphene Spray Ceramic Coating (if you don't care about the Zurich warranty) or just use the Ceramic Wax instead and Graphene DS to maintain. If you don't feel like doing all that, just wash it and use the Graphene DS to maintain it. Shouldn't be any issues.