ya it is. i tryed it once and all like slivers and shit got into the base of the skis and like it made this huge scrape. so ya it wasnt a good idea. it would work for like wat they did in war or watever where u go up and tap on it kus it is just putting on then hopping off. but sliding along it kills it
all the bark has to be gone and most likely if your edges are sharp you'll dig in(if the tree is rotting or like soaked in and damp), make sure its smooth and all divets and limbs are sanded down.