Yes, now that I hear what you want, Nick's solution - and variants - may very well be the way to go here: using grayscale pens for the 'screened' elements.
The decision to go with gray pens vs a 'screening fill' as I first described, depends on how easy it is to create a view/drawing that contains only the elements to be screened (place in PM and use gray as Nick says), or to distinguish the elements to appear lighter by assigning specific pen number to them (and changing those pens to gray in PM for that drawing - with the drawing having its own pen table).
Some things cannot be solved with either of the above. (Your situation can be I believe.) For example, I have a home with 45 degree wings, and so have 8 elevations. I use the 25% white/transparent screening 'fill' to make the angled wings lighter in the elevations. Using 'distant area' of the section tool does not cut those wings properly and they use the same pens as the face-on portions of the elevations, so a screening fill to mask them is my only option.
Between these three solutions, you can make anything happen.
😉
Have fun,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB