These are the stones I use but I will be unmounting them by soaking them in Naptha and then washing them and remounting them to Polycarbonate I heard from a maker in the state's that would be a good choice.
There is another way you can refresh the stones and that's with Silicon Carbide powder...
I need a bit of help with a question I have about Ferric Chloride.
I have sharpening stones made from a Copper Brass mixture that has Diamonds threw out the stone and over time the Diamonds wear down and you need to soak the stone in Ferric Chloride from what I was told for a little bit until...