what exactly does this do for the paint?
True story...meguiars is the ****. I'm pretty sure HMSUN uses it as well. Chris J loves Zaino. Turtle wax isn't bad but you get what you pay for. #6 meguiars is a cleaning wax. I hear they are kind of harsh on the paint so shouldn't be used often so I use meguiars gold class and love that.
EDIT:If you have more questions u may want to PM ChrisJ he is nuts about detailing his car