Replying to Urban Ledge

so there is this ledge near my house that looks absolutly shmick to slide but im just wondering  if sandstone slides well? or would i need to do anything to it... nothing to illegal of course lol... there is also a d-f-d-f-d agt about 90 degrees to it that would b awesome but living in sydney there is no snow and i dnt have money to build an expensive drop in ramp, but hey let me knw about the whole sandstone situation.

ill post pics later if i end up hitting it cheers NS