[rmorin49]

A decent product to clean the finish and apply a coat of wax/protectant is Meguiars Cleaner/Wax. Purists will talk about zaino and other high end waxes. Yes, they are good but they require more work than some are willing to put out. Personally I like Klasse products. PS21 makes a good Carnauba wax product but you need to clean/polish the finish first before applying any wax. There is a detailing forum on bimmerfest that can provide a lot more information but keep in mind, detailing products are a personal issue and you will get a lot of different opinions.