Use a clean, damp cloth to wipe away the soap solution and any dirt or debris. Repeat the process until the cloth comes away clean.
| Stain Type | Safe Treatment | |------------|----------------| | Oil/grease | Apply absorbent poultice (cornstarch + water paste). Let dry, then brush off. | | Rust | Commercial rust remover for natural stone (test first). | | Efflorescence (white powder) | Brush dry with stiff nylon brush. Do not rinse; it will dissolve back in. | | Ink/dye | Dab with acetone (test in hidden spot), then rinse. | how to clean sandstone window sills
In a bucket, mix 1 tablespoon of mild soap or a stone cleaner with 1 gallon of warm water. Stir the solution well to ensure the soap is fully dissolved. Use a clean, damp cloth to wipe away
Select the approach that matches the level of staining on your stone. Mixing Ratio General dirt and light maintenance 1 quart warm water + 1 tbsp mild dish soap. Vinegar Solution Mineral buildup and mild stains 1:1 ratio of white vinegar and water. Bleach Solution Killing mold, algae, and "green" growth 1:3 ratio of bleach to warm water. Baking Soda Paste Stubborn grime or neutralizing odors Mix baking soda with a little water to form a thick paste. 3. Application and Scrubbing Let dry, then brush off
Use a dry, soft cloth to wipe down the sandstone window sill and remove any excess moisture.