I use a paint sealant then 12 hours later apply a coat of carnauba wax. The paint sealant will last six months or more and regular carnauba wax will last two to three months. I clay the car then use a dual action orbiter with a polishing compound in two steps. Apply a paint sealant and let it cure overnight before layering with the carnauba wax. www.autogeek.net has a lot of helpful videos and information: