I am going to convert a bass with a rosewood fingerboard to fretless. Folks say flat-wound strings would suit such a fingerboard better because they won't wear it fast. But flat-wounds are rarer and more expensive at my place. Does anybody have experience with playing nickel roundwounds on an unfinished rosewood fingerboard? Do they really damage the wood so fast? Would light sanding, say, once a year be enough or will I end up having my fingerboard completely chewed up soon? I've heard a fretless can be finished with epoxy to wear better with roundwounds, is it a viable option? Won't epoxy crumble under dynamic load and how can such a coating affect sound?