Turtle Wax? OLD SCHOOL
Ahh brings back memories of the Bomb my father would not sell 1970 something Pontiac Catalina. That thing was big enough for all the bad news bears and the coach.
All these waxes Meguiars, Zaino, Klasse, Werkstatt Prime strong (my choice), Mothers, Clear Kote, 3M...they all produce nearly identical results. Just takes a bit more elbow grease with the cheaper ones and they don't last as long as the more expensive ones.
I think its always a good idea to use a light swirl remover like Poorboys SSR1 or Meg's Scratch X before getting out the polish.
If you are polishing you will probably doing several steps after that so its a good idea to tackle light micromarring before all that stuff gets layered.