What game are you working on?
Naphtha on a rag is safe on any pf. Novus 1 on a rag is safe for all but the most fragile pfs.
Neither will harm clear coat.
Using a scrubber or a magic eraser is what removes the clear coat.
You can use novus 2 on clear coated pfs for tough build up once in a while. Typicallly inlane and outlane ball trails and shooter lane. Finish with novus 1.
I don’t use novus 3 on pfs.
Never use water.
You can and should wax any Playfield clear coated or not. The brand isn’t As important as using a good carnuba wax without any cleaners or additives in it.
Clear coating is spraying clear paint on the pf, like the last layer on a car. It must be prepped correctly for that. I’m assuming you are not doing this an just using the wrong terms.