Acrylic render stains on a slate outdoor table can be unsightly, but with the right approach, you can restore your table’s natural appearance. Here’s a step-by-step guide to help you tackle the problem effectively.

1. Scrape Off Excess Render: Use a plastic scraper or a blunt knife to gently remove any dried acrylic render from the slate surface. Avoid metal tools to prevent scratching.

2. Prepare a Cleaning Solution: Mix warm water with a mild dish soap or a specialized stone cleaner. For tougher stains, add a small amount of white vinegar or baking soda to create a gentle abrasive paste.

3. Apply the Solution: Dip a soft-bristled brush or sponge into the cleaning solution and scrub the stained area in circular motions. Let it sit for 5–10 minutes to loosen the stain.

4. Rinse Thoroughly: Use a hose or a bucket of clean water to rinse off the solution. Avoid high-pressure washers, as they can damage the slate’s porous surface.

5. Repeat if Necessary: For stubborn stains, repeat the process or use a poultice made of baking soda and water. Apply the paste, cover with plastic wrap, and let it sit overnight before rinsing.

6. Seal the Slate (Optional): To prevent future stains, consider applying a slate sealer after the table is completely dry.

By following these steps, your slate outdoor table will look as good as new! Regular maintenance will also help keep it stain-free for years to come.