looking for a few experienced opinions

[Brad Purdy]

What is the best way to finish the walls in a small mechanical room that ultimately has a furnaces and return air drop as well as a plenum feeding an over head trunk line that will be it a soffit.
It all has to come out. Doesn't it?
Thanks. Brad

[Jim Luttrall]

I don't have a clue as to what you are asking.
Photos, more specifics would be helpful.