I need you help, guys. There's a spot I want to skate, it's about 6 feet to ground level and it has a ledge that's like knee high on it, making the drop a little bit higher than 6,5. I'm already planning on just jumping the ledge to flat, but I had the idea to do a 50-50 or something and drop to the other side. Thing is, the ledge is crusty as fuck(whole spot is, to be honest), not even crusty like any skate spot, but so crusty you see the little rocks mixed in the cement. Do you guys know of any way to make it grindable?