When in doubt .... lube !
For two?
BY the way, this emoji should be renamed the MindfulMan
I've never had a slide done, but do have a P229 with the guts done. It's slick, but I'd definitely still lubricate.
By any chance do you know if having NP3 applied to the slide will cause the process of anodizing loss on the frame rails to be slowed down? I'm referring to how the pigment on a sig's rails will change color from black, gold, silver, to dull silver ect from use and having the slide's action rub on the frame rails.