Thank you! Yes, I did it for a couple of knives. For stonewashing I just use some small river rocks in a Tupperware box. But by itself it's not so effective. I think that works better with specialized medium and in a machine over night. Acid-stonewash on the other hand works great for me. The acid creates a dark background that scratches rather easily, you get a nice stonewash in the Tupperware after 5-10 min. Maybe you have seen my two Pingos, the gray one has a normal and very subtle stonewash, the blue one acid-stonewash.