Hello Andreas,
I apologize if I have missed something here, but why are you using "reverse" electroplating and ferric chloride, when the Ferric chloride will do the same job alone? is it for speed? I also note the current you are using is "massive" In normal electroplating i.e. copper plating, I use less than 1 amp and it achieves the desired results! a rule of thumb being " less amps better finish!" is this also to speed up the process?
Many thanks
David