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There is nothing wrong with the nanocloth. It's just that most of us prefer honing over stropping. I guess.
There are many places to get the C12k, all you have to do is search. The invisible edge...

Get a Chinese natural stone (C12k). Cheap, and most of them are decent finishers and finer than a Norton 8k. Since you know how to hone on a man made stone, you may also try a natural.