Whiton Multi-purpose Cleaner can clean stubborn stains. Suitable for marble, paper stone, aluminum and stainless steel. Use an appropriate alkaline cleaner to scrub (such as Wittur's waxy water), and use Wittur's acid cleaner after clear water to quickly remove stains. ***This product has a very high concentration, so the treatment process should not take too long to avoid damage to the aluminum sheet. Remember to rinse thoroughly with water.

Usage and Instructions : Masonry surface, external wall dirt-1:45 spray this product on the marble or brick surface first, wait 2-3 minutes, scrub the stone surface with a brush for about 3 minutes, then rinse with water.