So much has been removed and I now have many holes to repair. The outside was already in rough shape with many obvious patches and some cracks. So I will refinish at least the forward 50%.
I have put plugs in the holes. This does not look ok from the inside. So I will use the table saw to rip thin (think thick veneer) strips of fir and install over existing T&G for the forward sections of the ceiling. This should cover up the holes and whole lot of ‘wear and tear’ and look original.