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How to Remove Water Stains From a Boat

Boats are bound to get water spots and scale formation on their hulls or anywhere there is fiberglass. Water spots get burned into the fiberglass by the sun’s rays and water scale spots come from the minerals in water that oxidize onto the boat’s surface.

Clean water spots from boats with household items.

The water spots dull the fiberglass, marring the boat’s appearance. Cleaners you may find in your kitchen and bathroom cabinets help restore shine and wipe away water spots.

  1. Mix a solution of two parts white vinegar and one part water in a bucket.

  2. Apply the vinegar wash to the water spots on the boat with a large sponge. The acid in the vinegar loosens the calcified water stains.

  3. Rinse off the vinegar wash with a garden hose or a bucket of water.

  4. Pour toilet bowl cleaner into a spray bottle until it is 3/4 full. Fill the rest of the bottle with water.

  5. Spray the toilet cleaner onto the water spots on the boat and allow it to sit for five minutes.

  6. Rub the spots with a damp rag until you no longer see them.

  7. Rinse the toilet cleaner from the boat with a garden hose or a bucket of warm water and a sponge.

  8. Mix 1/4 cup of dish detergent in a bucket of warm water. Wash the boat with the sudsy water and rinse thoroughly with a garden hose. Dry the boat with clean towels.

  9. Warning

    Do not mix vinegar and toilet cleaner together. Use each one separately and diluted with water.