I'm not sure if this is the place to post this question, but it seems like the most appropriate forum.

My husband and I are in the process of buying a new house. While walking around on the land we noticed an old free standing, metal playground slide under some trees. We looked at it more closely and saw that it seemed to be sturdy and sound (no holes or anything) but there was a layer of rust, or some other corrugation, coating it from top to bottom (it isn't red colored, it's more black). The slide's not very slippery in other words. Is there any way to resurface it to bring back the slip? Is it worth it? It is a neat slide in a nice location, but I suppose we could eventually just buy a new one.

Thanks for your help!