Restoration suited to the building, not just the stone
Edinburgh has an unusually high concentration of marble and polished stone in everyday use. Georgian New Town townhouses and their converted apartments, Old Town flats, Victorian and Edwardian tenements, and a large number of hotels and hospitality venues occupying period buildings all carry marble in the places that get used hardest: hall floors, stair landings, fireplaces, bathrooms and bar and reception counters.
Those settings shape the work as much as the stone does. Access is often up a shared stair with no lift. Adjacent finishes — original timber, cornicing, plasterwork, carpeted communal areas — need protecting before any machine is switched on. In a hotel or restaurant, the area may only be available between closing and opening. None of that changes the restoration method, but all of it changes how the visit is planned.
The underlying principle is straightforward. A marble polish is the stone's own refined surface rather than an applied coating, so dull, etched or lightly scratched marble can generally be re-refined in place instead of replaced. What is realistically achievable depends on the stone, the depth of damage and any previous treatments, which is established by inspection and a test area before the main work starts.