I tried it with mixed results. It works fantastic on super quality wootz. It creates outstanding 'white' wootz effect, where light pattern appears almost mirror-like, whereas FeCl tends to dim/dull them a bit more. As I mentioned above, it would not help with low contrast woots, and an acid may develop it even better. FeCl, mixed with Nitric Acid would produce the same effect if properly applied (and properly AND SAFELY!!! mixed) on good quality wootz, and it would be impossible to tell which etchant was used by the finish.
Unfortunately I have only a few grams left, and if split it'd be not enough for any of us:-)
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