I am sure that you know that, in the past, piano keys were covered with fine pieces of ivory which is thankfully now outlawed. I collect old and scruffy piano keys from a variety of sources. I managed to get my hands on a slightly challenging batch recently with chunks of wood and splinters still attached. I discovered that an overnight soak cleaned them up enough for the next stage of their new life. Each key is sanded and has the edges rounded. (It is a team effort, so I Bill tackles this for me while he watches football coverage!)
Thimble & Needles Rule

