We bought a house 3 years ago - it was built in 1972. Most of the textured ceilings were already removed, except for a few. I recently noticed the texture actually extends behind the wall-mounted HVAC vents. Mostly to the top of, but also the bottom of the actual ductwork.
The vents seem to attach in a way that you cannot get them on and off without scraping some of the texture. I've never removed them before, but there appears to be loose texture on the bottom of the HVAC ducts.
What's the best course of action to deal with this?