Swix X-Fine Steel with Green Nylon Border Rectangular Wax Brush T0191B The ultra fine bristles on this steel brush go deeply into the base structure of your skis to clean the base. This brush can also be used as the second brush after applying hot wax, scraping it, and brushing it with a larger bristled brush. This ultra fine bristle brush goes deep into the base structure to clean and refresh. 4-5 passes for best result. For alpine and nordic skis as well as snowboards