"To restore the pristine glory of the Taj Mahal, as a conservation measure, the clay pack treatment, which is non-corrosive and non-abrasive, should be carried out for the removal of the accretionary deposits," the report said.
The report recommends that the application of a mud pack should be a regular event to keep the marble's surface clean.
The treatment is expected to take two months and cost around $230,000. Link -via Arbroath