Algae stains on a vitreous enamel outdoor table can be unsightly and difficult to remove if not treated properly. Fortunately, there are several effective methods to restore your table's shine without damaging the enamel surface.

1. Vinegar Solution: Mix equal parts white vinegar and water in a spray bottle. Apply the solution to the stained areas and let it sit for 10-15 minutes. Scrub gently with a soft-bristled brush or sponge, then rinse thoroughly with water.

2. Baking Soda Paste: Create a paste using baking soda and water. Apply it to the algae stains and let it sit for 20-30 minutes. Scrub with a non-abrasive cloth or sponge, then rinse clean.

3. Bleach Dilution (for tough stains): For persistent algae, mix 1 part bleach with 4 parts water. Apply sparingly to the stains, wait 5-10 minutes, then rinse immediately to avoid enamel damage.

4. Pressure Washer (gentle setting): If your table is sturdy, use a pressure washer on a low setting to blast away algae. Keep the nozzle at least 12 inches away to prevent chipping.

Prevention Tip: To avoid future algae buildup, cover your table when not in use or apply a protective wax coating periodically.

Always test any cleaning solution on a small, inconspicuous area first to ensure it doesn’t harm the enamel finish. With these methods, your vitreous enamel table will stay clean and vibrant for years to come.