Replying to Back Yard Setups

Alright. So I didnt know exactly where to put this thread but here it is.

My buddy's house has a backyard that has a wooden rail from a stairwell. With a snowboard, he can 50/50 it but with skis I will not be able to due to edges and stuff like that. My question is, what would the best thing to put on the railing to make it ski-able? It is a flat railing. We were thinking that a piece of Flat PVC would go right over it? Maybe put a PVC pipe on it? or maybe double PVC pipe it? Need some advice/feedback on this semi-setup. Thanks +K