I have an old, Buffet-Crampon wooden clarinet that has sadly been in storage without climate control for years. When I rescued it, i knew the pads and corks would need replacing, but when I opened the case I saw that the finish on the keys has deteriorated to a steel gray color instead of shiny silver. It almost looks corroded. So I am wondering if it is worth salvaging or if the cost would justify buying a new clarinet altogether. Any advice?