In either of those cases I doubt PDR would get the dent 100% back to good. A trained eye or the right lighting/refelection will bring it out. That said, they might be able to reduce it somewhat. Anytime you have a dent on a natural crease or a dent that results in a crease it most likely will not come out. However, if a gifted PDR professional can reduce it most of the way the panel is saved which does vastly contribute to resale value if the car is 100% original panels and paintwork to begin with.

Hope this helps....Lee