Cleaning coffee stains from stainless steel is easy.
Boiling water a tablespoon of TSP and let it sit overnight should do it.
Be careful not to get TSP solution of power on skin...
I use to clean aircraft coffee containers this way.
All cars should come without a sunroof and has the option to add one as they takes up headroom.
I need all the room there is as I am 6’7” and my head touches the room all to often.
If a tall person is ever in a rollover accident the space that the sunroof occupies could mean the difference...