Asking 'cause a friend in the ski industry was passing through on his way back East from the FIS alpine ski racing championships at Beaver Creek, CO, and he left me a gift of 60+/- Swedish Oberg and Finnish Viiala 8", 10", and 12" files that ski techs used to sharpen the steel edges of alpine skis. About 1/3 are new and the rest used, but not much as they appear to have been well maintained. The Oberg files have an integral handle, rather than a sharp point to attach a wood handle, and look like they might work as the basis for a knife.
Do any of you build knives from files and, if so, what are the challenges?