Meguiars grape jelly! (i.e. Gold Class Endurance Tire Protectant Gel). A single coating has lasted well over two months. Still enough in the bottle for at least 3 or 4 more coatings.

The wife said it looked BETTER than new. Showed it off at a car show and people thought it must be the new 2007 model.

Water even beads off of the cladding. A quick wipe and dust comes off easily.

Go grape!