Even better off with a good sealant with UVA/UVB protection like UPGP below the wax.
Also, for cars that are in the sun all the time, don't forget the plastic and rubber trim. People often forget the trim around all the windows, but over time the sun will fade and even damage this trim causing it to bubble or crack. For that I go with UT&TGP for its longevity and no streaking off with rain.
And, don't forget to seal your wheels as the sun as well as road grime will do a job on those. I just use UPGP for that, but some highly recommend specific wheel sealers.
And then. of course, you need to protect the interior leather, vinyl, plastic, carpet, etc.