If all goes well the walls in my metal building will be insulated (outer layer only) by the end of the week, and I’m trying to decide what to do with the ceiling. Don’t want sheet rock, and I’m thinking metal panels, but never worked with them on the ceiling before.
If you have time, check out some videos by Rural Renovators. The dude has really good coverage of some of their post frame buildings and some include the ceiling like you are asking about as well as interior walls and insulation.