The best polish depends on how much paint you want to polish away

For a very light polish you can use SRP which will also fill swirls to a degree and its also a good cleanser before you lay some wax.

For more cutt you could use Gtechniq P1 by hand if you dont have a machine.

Heres a demo for P1 via hand


As far as wax goes use a high content pure carnauba wax that will give it a lovey wet look. ( Also much nicer to apply than Hd wax ect)

Or if your not into waxing all the time stick some Gtechniq C1 or Exo for a more durable coating.

Exo is much easier to apply.

Also use a tar remover before you clay.