Here is a link to Zaino's tips and tricks. I am a true convert to polymer based polishes and you can tell the difference between cheap and higher end products in the final finish and durability. Zaino works for me and it is worth the extra cost. My 99' Black on Black has a better finish than most cars on my dealers lot! It does help to have a car cover or garage (I don't) to keep it nicer longer. You want to really amaze someone, detail your engine compartment to the dame level as the exterior! My mechanic hates it when I go in for service...they have to give it back in the same (clean) condition!
Good luck