I realized right now that I don't hear many people talk about these. I find them quite useful, though. Does anyone else use them and how? I don't have any special tools to use them on, but I find them (and a slurry stone due to dimensions) useful for polishing metal and getting into little crevices like tang jimps. Do any of you have recommendations for how to best use them? I find keeping a wet slurry on them difficult.