Polishes are used accoring to the type of finish and problems encountered.
Poorboys polishes are very user friendly and PC friendly as well. Their SSR2.5 makes for a good polish to remove swirls w/o leaving any haze as in other polishes. You can step down to SSR1 or Pro Polish. All very easy to use, sun or shade!
More "advanced" polishes require use of a rotary for the best results. Menzerna is one of the finest polishes out in the world, but they are mostly used in an OEM/Tier 1 type application where quick touch-ups are needed on the line. They have been used in the detail market and adapted by the newer/reformulated Final Polish II or Micro Polish. Same as FP, just a bit more lube so it can be worked longer via a PC or rotary.
Meguiars makes some very nice polishes for the detail trade and some find these a bit more useful in that they work well, have clear labeling and most can be worked with a PC or rotary. DACP is one of the most widely used due to the effect it has. It removes swirls and polishes at once. Most get a bit of haze, some get more depaending if a cut pad was used. Then, you have to polish out the haze with say Megs Machine Glaze or other glaze or polish.
Zaino Z5 really has very light hiding of swirls. They're still there, just hidden. The best way to enjoy Zaino results is to get the finish as swirl free and glossy as possible. Zaino Z2 for clearcoats is very clear and only will highlight any defects. You also have to remove all oils/waxes from the finish, mix up Z5 or Z2 with a catalyst called ZFX or use a pre-binder polish Z1 that you don't remove, but lay your Zaino Z2 on top of it.
Easy way around this: Poorboys EX-P. You'll get a great level of shine and it's much easier to apply and remove. I've used Zaino for some time, but find that there are products that are easier and give as close a shine level as Zaino.
Another is UPP. Klasse also has a nice shine level as well.
It's just one of those things; what looks great to you may not look as good to other people and some people just get blown away from types of sealants/waxes etc.
Lot's to choose from.
Regards,
Deanski