I'm a fan of Adam's Polishes products. I generally use Mother's Clay bar, then apply the necessary amount of polishing to get the swirls out, followed by Adam's Ceramic Coating Spray. The ceramic spray will last about six months or more from my experience.
I would clay bar it first and use wax or ceramic spray. Then after any future wash use a detail spray. About 6 months later start all over again with the clay bar and wax or ceramic spray. I like Mother's Clay Bar kit. I just used CMX ceramic by Mother's for the first time, I like the results so far.