dig out blocks if the pow is compacted a lot, build it out of them, stomp it all down with skis on to compact it, then salt and water, leave till it firms up on the takeoff, then tear it up. building the day before u wanna hit it, or at least building the main bit of it also helps it freeze and compact overnight. Water and salt on the lip and the kicker face itself. If u end up having to put a fair bit of water down on the kicker face to get it solid throw a thin layer of light snow over the top of the water you put down as soon as u have put the water on, to stop ur takeoff turning to ice - generally u dont have to do it, but we have had to do it like twice with little kickers we shaped when the snow we had was super grainy and wouldnt rly bond too well.