S Strauss95 In the past when I'd discussed the matter with Konstantin via PM, he was not in favor of using a nagura, (which I've not tried so cannot comment further), but did recommend the use of a "rust eraser", which Wade had mentioned using with his own Venev bonded hones in his posts here.
Since I already had a few on hand, I've been using the rust eraser and then a quick run under the faucet to keep mine free of swarf buildup in use. Seems to work well.
Just another option to consider.
Good to know, thanks for the heads up! I used the nagura after seeing both Michael Christy and Big Brown Bear use them on the Venev stones so I thought it was a good idea. I did notice the barkeepers friend removed the loading quicker than the nagura stone did. Those guys mentioned in their videos that not only did the nagura clean the stones, but it helped keep them flat.
I wonder what the issue is with using the nagura? Possibly wears them out prematurely?