What ever you feel your car needs mate!
But usually a good wash, de tar, clay, polish, cleanse and wax! The list of thing you can do is endless, but as long as you remove all contaminants, polish either by hand or machine then seal or wax thats it!
Anyone tells you any different there either selling products/ services or have been listening to someone who is!
But using a machine polisher is defo a skill and you need to know what to use as the lacquer depts are different on every panel of your car.
So I was just a coat of wax off my thread title being correct however I could argue that the super resin polish is an "all in one" and therefore constitutes this