Remove any objects from your solid, white-oak table and place them to the side. Dust the table, including its underside and legs, with a soft cloth or piece of cheesecloth following the wood grain.
Mix in a plastic container 1/2 cup mild nonalkaline soap and 2 cups warm water. Put on latex gloves to keep hands dry. Stir the soap mixture with a soft cloth. Wring out excess and scrub the table gently to remove any caked-on dirt and debris.
Dry the table with a clean, soft cloth or piece of cheesecloth following the wood grain.
Remove any objects from the oak table and place them to the side. Dust the spot containing the watermark with a soft cloth or piece of cheesecloth to remove any loose dust and dirt.
Apply white toothpaste to the stain and gently rub the substance with the wood grain. You can also apply mayonnaise or vegetable oil to the watermark.
Wipe the table dry with a clean, soft cloth or piece of cheesecloth.
Remove any objects from the solid white-oak table and place them to the side. Dust the spot containing the white mark with a soft cloth or piece of cheesecloth to remove any loose dust and dirt.
Pour lighter fluid onto a clean, soft cloth. Wring out excess and gently rub the white mark following the wood grain.
Mix in a plastic container 1/2 cup rottenstone and 1/2 cup vegetable oil. Stir the mixture with an old spoon. Rottenstone -- a decomposed siliceous limestone used for polishing -- is available at hardware, home-improvement and woodworking-supply stores.
Dip a clean, soft cloth or piece of cheesecloth in the mixture, wring out excess and gently rub the area where the white mark was to remove any residue. Follow the wood grain.
Wipe the table dry with a clean, soft cloth or piece of cheesecloth.