Absolutely second that. No abrasives or polishing compounds either.
PWP is three-stage as noted albeit in different terminology, however the OEM Honda touchup paint is supplied as a two-stage application.
PWP doesn't really need any above and beyond care like black. White and silver are the easiest car colors to maintain, but three-stage paints are more expensive to repaint so you want to maintain them.
For basic care that will have your PWP CR-Z looking great a decade later:
Basic wash routine: Spray the car down getting as much dirt off the car as possible with the hose then a simple top to bottom hand wash with a car soap (no dishwasher detergent) and soft sponge designed for car use. Hand dry with clean cotton towels.
Basic detail routine: Once every six to twelve months wash, then use a clay bar if the paint feels like it needs it (Mothers for example, follow directions on the box), then wash again, then hand wax. If it doesn't need clay then just wash and wax. Doing this once every 6-12 months will have your car shining like new well into six-digit mileage.
You'll get a lot of different opinions about using fancy sponges and expensive special order products but these basic guidelines with a decent Auto Zone sponge and liquid wax will have the car looking great and staying great for a long time. You don't need to break the bank, professional detailers make a living off of upselling.