I was recently hanging out with my friend who's a cross country skier. Shes pretty good (like top 20ish or so in the country) and she was showing me her new toys in her tuning room, yes she has a tuning room and I am completely jealous. Anyways she had a new pair of skinny skis that were just stoned I guess and I was checking them out, and she told me not to touch them. I thought she was just being over cautious, but she continued to tell me how the oils on our fingers go into the base and can mess with waxes.
It kinda makes sense I guess, but does it really matter? or maybe it's just a cross country thing.