We were so emboldened by our progress removing paneling in the Sun Room, that we expanded our efforts to the attached Study as well. The paneling there had some major cracks and just didn't look right to our eye. So we took down one sheet after another until all of the walls were exposed. It was not until taking down the last couple of sheets that we saw the worst damage, especially over the fireplace.
We could have continued the newer drywall from the ceiling and upper portion of wall down to the floors. Instead we opted to refinish the wall area we exposed.
Here is a picture of the work in progress. A photo of the end result will follow.