Excellent for the final removal of very hard waxes typically used in cold conditions. In these conditions, one wants to be especially careful to remove all wax from the surface of the ski base. In very cold weather, it is also common for a person to brush skis indoors then go outdoors and ski a bit and find "white bases". This whiteness can be additional wax that has been squeezed out of the base by the cold. Another brushing outside before the start with the horsehair brush will fix this problem. Many people use horsehair to finish fluorocarbon applications. I have found the nylon polishing brush to be a little better.