Hi there, apply a dab of mayonnaise with a soft cloth and rub it into the mark in small circular motions. Leave it on for an hour or two (or even overnight) and wipe and buff with a soft, clean cloth until. If the watermark is quite deep, dip a rag into a mild solvent such as mineral spirits or odorless paint thinners. Squeeze the excess out and then rub gently until the stain is gone. You will need to test that the solvent doesn’t harm the finish by putting a small amount on an inconspicuous spot (perhaps the underside). Best of luck
Hi! I recently salvaged an antique dresser top using a product that is waxy but, actually did lift out a dark water mark. I'll attach a link. I have also used the Restor-a-Finish made by the same company and it is excellent. You may need to use steel wool with it, but, it is an easy process. Go with the grain of the wood. Stay safe!