Here's a usage guideline:

1. Cleaning: Use a soft, damp cloth to wipe the surface of the concrete side table regularly to remove dust and dirt. Avoid using abrasive cleaners or harsh chemicals as they can damage the surface.

2. Protection: Place coasters or mats under hot or wet items to prevent stains and heat damage to the concrete surface. Avoid placing sharp or heavy objects directly on the tabletop to prevent scratching or chipping.

3. Avoid Oil and Acidic Substances: Refrain from placing oily or acidic substances directly on the concrete surface as they can cause staining and etching. Wipe spills immediately with a clean cloth to prevent absorption into the concrete.

4. Regular Maintenance: Periodically apply a concrete sealer or wax to protect the surface and enhance its durability. Follow the manufacturer's instructions for application and reapplication as needed.

By following these guidelines, you can maintain the beauty and longevity of your concrete side table while avoiding damage from oil and acidic substances.