Take a soft cloth (old T-shirt is good) and moisten it with denatured alcohol. In this case, moist would be the way a health dog's nose feels. Take the moistened cloth and swipe it (do not rub it) over the affected area several times until the white goes away. Keep in mind that if the finish is shellac, denatured alcohol will soften it, so be careful.
>Actually just did this on our dining room table after the relatives left after Christmas - a vigorous rub with a soft cloth and non-gel toothpaste worked. I forgot where I saw it, but did an online search, and saw that trick mentioned several times. Also saw the one about the denatured alcohol, but I didn't have that on hand.
>Some of the methods mentioned may affect the finish. The white mrks are caused by water trapped in or just below the finish. The best way to remove the marks is to take a dry towel. I prefer to use linen rather than a terry cloth type, but either should work. Fold it 2-4 layers thick and palce it over the water mark. Take a clothes iron on the linen setting (this is why I use linen towels) and "press the towel" with the iron. As the wood under the towel gets hot, the water mark will disappear as the water is changed to vapor and escapes. Lift the towel from time to time to check the progress and move it around to heat different areas of the mark. Once you can't see any more mark, let the area cool. Repeat if necessary.
The only caution is to not scorch the linen towel. If you don't scotch the towel you won't damage the wood or the finish.
>Coincidence! This tip from Associated Press was published in our local paper this morning:
Place a small amount of mayo directly on the white ring. Cover with plastic wrap and let sit for about 30 minutes. Then lightly rub the mayo into the ring using a nylon scouring pad, working with the grain. Wipe up with a soft cloth and use lemon oil or paste wax to restore lustre.