The subwoofer cabinets were finished with the full faces intact, so that the clear coat will be smoother around the driver opening after that material is cut away. On the KPT-415 cabinets, I cut the woofer openings first, because I needed the material for the inside of the port holes.
Each project gives me a little more experience, so by the time I finish my home theater, I might be good at this hobby. Got to have the right tools and proper supplies. Adequate work space where the parts can be left undisturbed and a lot of patience helps.