Whilst your waiting for the PC to arrive, evaluate your paint. Do you have lots of swirls, do they look deep into the paint.
I would start off by buying moderate polishes such as Sonus SFX-2 before and maybe some chemical polishes such as Klasse AIO or Autoglym SRP. I think it can be to easy to buy heavy duty polishes when you are rarely going to need them.
A mixture of a mild polish and a chemical cleaner can take care of 80-90% of defects