You can follow these steps to remove water stains on wood table.
1. Spread about 2 Tablespoons of mayonnaise on a paper towel.
2. Place the paper towel on the white water mark. Press lightly.
3. Leave the mayonnaise on the stain about 15 minutes.
4. Lift the paper towel and check the stain. If the mark remains, rub more mayo into it again and check it later.
5. Stain should be gone.