Not sure if you can grind it? Slap some wax on it and find out! This skate wax by Snot Wheel Co. is specifically made to reduce friction on grinding surfaces like rails, curbs, ledges, or wherever else you shred. Reduce the damage done to your board and nail those grinds with Snot Wheel Co. Curb Snot Wax Stick Includes: One (1) Snot Wheel Co. Curb Snot Wax Stick from Snot Wheel Co.. To use: Find your sweet spot on the curb or rail, rub the Snot Wheel Co. Curb Snot Wax Stick into the edge of the curb or grinding rail as hard as possible, until you see it start to cake onto the edge. Give it a good covering over the corners, top, and side, covering the entire surface. Grind the surface with your skateboard repeatedly until the wax blends with the surface, making it slick and easy to grind. Remember: property owners and law enforcement often regard waxing curbs as vandalism. So watch what you wax! Also, remember to be careful since your speed will surely increase!