Polish and wax are two different things. Polish first, then wax.
You'll get lots of opinions, but for me (Tornado Red) Autoglym SRP followed by Autoglym HD Wax is decent.
Only criticism is for the SRP. It can get a bit chalky taking it off especially if it's hot and sunny. There's a knack to it.
HD Wax is top stuff though, can't fault it.