Stone tabletops are susceptible to staining. Exposure to insect repellents and suntan lotions and sprays may cause discoloration. Spills of acid-based liquids—such as coffee, wine, and fruit juice—should be wiped up immediately with a clean, soft cloth to avoid staining.
For routine maintenance, rinse the tabletop with warm water to remove surface dirt and wipe dry with a clean, soft cloth. For normal cleaning, wash the surface with a mixture of a mild detergent and warm water and rinse immediately with warm water. Wipe dry with a clean, soft cloth. Do not use abrasive or acid-, alcohol-, or solvent-based cleaners. They will damage the surface.
Herman Miller outdoor stone tabletops are treated with a sealer that penetrates deep into the porous surface. These tops require occasional resealing. To determine whether it's time to reseal your tabletop, pour a small amount of water onto it. If the water beads, resealing is not necessary. If beading does not occur, apply a natural stone sealer, available at hardware and home improvement stores, to provide continued protection. Follow the manufacturer's instructions for use.
For normal cleaning, wash coated metal surfaces with a soft cloth soaked in a mild detergent and warm water, then rinse thoroughly and dry immediately. Remove scuff marks from low-gloss coatings with presoftened paste wax, following the manufacturer's instructions. Use automotive polishing compounds, either liquid or paste, to remove scuff marks and scratches from high-gloss coatings. After polishing, apply a presoftened automotive paste wax to restore the original sheen.
Prolonged exposure to direct sunlight will cause your stone tabletop to fade. Placing the table away from direct sun or covering it appropriately when it is not in use will help avoid fading. If you choose to cover your table, be sure to remove the cover when the weather is warm or humid to reduce the chance of mold and mildew growth.
We also recommend bringing the furniture indoors for storage if the temperature stays below 40 degrees Fahrenheit (5 degrees Celsius) for an extended period.