This totally works! Done it twice now and it works perfectly. Also read somewhere gnats are attracted to the color yellow so I added a little yellow food coloring the second time. Got more gnats with the yellow!
How to restore scratched and worn wood. for watermarks - mix a thick paste of olive oil and salt and rub onto the wood - leave it for about 30 minutes. The salt draws out the moisture and the oil feeds the wood, Then rub Old English Furniture polish
For icy steps and sidewalks in freezing temperatures, mix 1 teaspoon of Dawn dishwashing liquid, 1 tablespoon of rubbing alcohol, and gallon hot/warm water and pour over walkways. They won't refreeze. No more salt eating at the concrete in your sidewalks.