My pano sunroof (the movable glass part) was rattling like crazy last week on a trip to Bend Oregon -- where I encountered lots of washboard roads I took at a bit of higher speed.

Searched and didn't see posts about this. Anyone else's sunroof rattle? (it was fully closed, and the blind open or closed made no difference)

 

Just like the door seals, try cleaning the rubber sunroof seals with isopropyl alcohol on a paper towel then apply Honda Shin-Etsu grease to the rubber seals.