Does anyone use Mother's California Gold.? It is a carnuba based wax as are many of the products talked about here. It may not be the trend but I have used it since the old days. Some old geezer once told me that carnuba was the best thing for auto finishes. Maybe he had done too many drugs in his lifetime but he was driving one hell of a '73 Dodge Challenger, fully restored, last year.
Other than the polymer finishes carnuba seems to be the key ingedient.