Just in the way they're catagorised products usually classed as Polishes/compounds, waxes and then there's sealants such as Dodo Acrylic Spritz, Britemax extreme elements etc, obviously you can go down the ceramic route but as you say they look more professional use and very expensive.
I was thinking of going down the route of prepping the paintwork with either AG SRP/Dodo juice lime prime, then a sealant like above or AG Extra gloss protection then a few coats of wax........Am I heading in the right direction there????