Recently, I have a project where there is a need to define another material on the same wall (in this case, it is for CMU wall). Since we will need a different CMU finish to differentiate within a wall, so I suggested using the Split Face and the Paint tool to get the job done.
In this case, I choose "Wall" as a category
Next window allows me to add fields to my schedule, I then notice there is a field/parameter called "Material: as paint". Sounds like something suitable in this occasion.
As I move on to the filter tab, something interesting shows up...
I can now set the "Material: as paint" to equal to "Yes", which means I tell Revit that this schedule only look for the "Paint" surface on all walls; the next filter rule, I can even set it to a specific material to be included in this schedule.
The last thing is to tell Revit to calculate total area for this particular material.
Once this is done. Volia! I can now let Revit to keep track on all my "paint" surface.
What's more is you use "Highlight in Model" to make Revit show you which wall that has been "painted".
This trick offers another easy way to help you keep track the "painted" wall.
Afterall, it seems like the Material Takeoff schedule can do more than just schedule. Hope you will find it useful!