I detail cars for a living and I would never rely on what dealers sell you all waxes ( carnauba) or sealant ( synthetic wax ) will come off after time. I would look in to other brands besides Adams they make good products but for the price you can get much better. I always clay bar cars before any protection wax sealant or coating like opti seal or opti coat 2.0. I really like wolf gang deep gloss sealant its a great sealant wax.
Check out autogeek.net for more advice and great products they also have a forum.