Have a spot you in tabletop?
Then make a cloth wet with water and a few drops of vinegar. Put those three hours on the table, then good rub with a wet abrasive pad and the stain is gone.
Heat the contents of a can or bottle of regular beer, it may just not cook. rRb the beer with a clean cloth on your wooden table, allow to dry and just wipe with a damp cloth, table you get so old color and luster.