That polisher is pants guys, Not usually one to rubbish anything but that is just throwing money away.
Spend £100 on a decent orbital Polisher(DA) and you will have your car looking fresh as a daisy.
Decontaminate,
Clay,
Poilsh(DA)
and wax/Seal..
Good thing with a DA is that it's gentle on the paint(Depending on what compound you are using) and are less likely to go through the paint when it comes to edges etc.
Using a Rotary can be brutal in the wrong hands.
You can also use a soft finishing pad to apply your wax nice and thinly over the bodywork.