White mold on outdoor tables is a common issue caused by moisture and lack of proper maintenance. To prevent it, start by choosing mold-resistant materials like teak, cedar, or metal for your outdoor furniture. Regularly clean your table with a mixture of water and mild soap, and ensure it dries completely. For existing mold, use a solution of equal parts white vinegar and water, or a commercial mold remover, scrubbing gently with a soft brush. Applying a protective sealant can also help repel moisture. Store your table indoors during wet seasons or cover it with a waterproof cover. Proper airflow and sunlight exposure will further reduce mold growth, keeping your outdoor table looking fresh and clean.