Do ~12k grit oilstones exist?
My 52100 steel rusts while sharpening on waterstones. I've never had this problem before with other carbon steels. Right now I finish on my Naniwa 12k dry, which works but loads up over time. I know the more porous waterstones are easily destroyed by oil, the Naniwa might be able to take it, but I'm NOT taking the risk destoying such a nice stone.
My Chinese 12k can be used as an oilstone, but the one I have now is more like an 8k stone that just cuts slow.
So are there any ultra fine oilstones?