Coated Rotors

Coated rotors should only be cleaned well with soap and water before installing.
NO scrubbing with harsh cleaners like brake cleaner or scuffing of any kind.
You just want any possible oils removed.

Also in case you didn’t know already there is a recommended break in procedure for pads and rotors so they work as good as they can.
Most people just slap em on and drive normally which is not the right thing to do.
Here is some break in info from Wagner.
Disc Pad Break In