I need to know how to make a stainless steel children's slide less slippery. It's quite steep and little kids reach some quite scary speeds going down it. At this point, changing the angle of the slide is not an option. Does anyone know of any kind of treatment, spray or anything else that can be applied to the surface of the slide to make it less slippery? I still want kids to be able to slide down it, just not at the speed they currently are. Any help or suggestions would be greatly appreciated.