Granite is an excellent choice as a floor tile because it is one of the hardest stones available. Other stones, such as marble and steatite, will not damage granite, but pieces of glass driven by pedestrian traffic. Performing a surface repair by polishing the stone is a difficult job that should be done by a professional, as improper technique can cause more damage than existing ones. For small scratches, however, you can try to repair it yourself.
Step 1 – Examine the stone
Check that the mark is actually a scratch rather than an imperfection of the stone. Examine the striped floor tiles from different angles in the light of the sun to see the extent of the scratch. If there are a number of marks and imperfections, it may be time to call in a professional to seal and polish the slab for you. Do not try to polish yourself, you could create a lump in the tile or surface, which could permanently damage it.
Step 2 – Clean the tiles
Spray stone cleaner that does not rinse on the tile and let it sit for about 5 minutes. Use a microfiber dust pad to clean it, then dry it.
Step 3 – Polishing Surface
Use a dry steel wool pad in a circular motion to polish the surface of the tile. Keep the pressure light and prolong the motion to also take the area surrounding the scratch. Afterwards, clean the area again and allow the granite to dry completely before using a soft cloth to polish the surface.
Step 4 – Fill in the deep scratches
If there are deeper scratches on the surface that have not been removed by polishing with steel wool, you can fill them using a grout mix. Mix the grout according to the manufacturer's instructions and apply it to the tile. Press the grout into the tile and smooth it so that it is level. Let the grout dry for 24 hours, making sure nothing is on it. Apply two coats of grout sealer 48 hours after application to protect the surface from future damage. Allow the first coat to dry completely before applying the second.
Step 5 – Paint faded areas
For areas with a slightly different color, use a paint marker or permanent marker to color the marks carefully. Wipe the area with a cloth to remove any excess ink, then clean the entire floor with a granite-based cleaner and let it dry overnight. Inspect the scratched area in the morning and make additional repairs with the marker.
Step 6 – Seal the granite
Use a water-based putty to seal the entire floor to ensure uniformity of finish and protect the damaged area from future damage. To avoid scratches, use doormats or remove your shoes when entering the house.