Need help modelling a Wall Reveal

[Sollune26]

Hi, im currently struggling on modelling a wall finish element, i usually called it U channel wall reveal. so the issue is, i kinda understand on how to make it by using an object alongside the wall then use substraction command to create the reveal then later hiding the object layer thats used to cut/substract the wall. then use another complex profile for the U channel to cover the reveal. but, is there another better or more efficient way? so i dont need to create 2 elements just to make a single reveal+finish

Operating system used: Windows

[Ignacio Azpiazu]

If you don't need the U channel itself, but only the cut with a different surface on the cut faces; and if they are planar walls (don't remember what happens in curved walls, but I suspect it will not work): the W Niche window does the job for straight horizontal and vertical reveals.

For other designs (diagonal or curved reveals, on a planar wall) the Opening tool may do the job.