According to Auto Glymn the best way to do it is to wash car first and get in bone dry (which is the easy no brian bit)! Then wax the entire car front to back, top to bottom. Then with the wax on do all your trim bits with a vinyl trim cleaner (this way if you go onto the paint its protected with the wax). Once you do this go over all the panels removing the wax and giving it a good buffing! Last job being cleaning the windows and wheels and stuff, unless you put a final extra protection top coat on.
You used to be able to get full details off there website. Hope this helps.