Cleaning Quarry Tiles
To resolve the problem we had to strip off the Varnish coating from the Quarry tile using Tile Doctor Remove and Go which is especially designed for the safe removal of coatings from tile and stone. The product is diluted and spread over the floor allowing it to soak into the tile for around fifteen minutes before being scrubbed into the tile using a rotary floor scrubbing machine fitted with a black pad. The soiled solution is then washed off with clean water and extracted from the floor using a wet vacuum. There were some stubborn areas and these were tackled by repeating the process but this time with the addition of a steamer. A stiff brush was also used in the grout lines and when we were completely satisfied with the condition of the floor it was given an thorough rinse using cold water. The wet vacuum was used again to remove the water and get the floor as dry as possible.Sealing Quarry Tiles
The floor was left to dry overnight and we came back the next day to seal the floor using four coats of Tile Doctor Seal and Go which will protect it going forward and it also adds a nice shine to the tile.Source: Expert Quarry Tile Maintenance site