maintain

as promised here's the car prior to washing this morning: and later after washed, dried, spritzed with Crystal mist and rained on three times during the day:

Someone a while ago recommended a product that maintains tyres balck colour and prevents them from fading etc, I cant find the thread or product. Anyone got any suggestions??? I have previously used stuff like Turtle Wax's 'Wet N Black' but am looking for something more long lasting, durable...