For 2D views change the camera view to parallel projection.
Go to camera drop down menu, select parallel projection. If you do this, you shouldn't have to do what you proposed, as you will have a flat 2D view.
I often put different walls or bents on their own layer and that way I can turn everything else off and work with only the sub assembly I am wanting to work on.
Alternatively, you can use the section tool to show an interior bent/wall, etc.
