Keith,
Thanks for the thought on reverse plating. I have made enquiries about the possibility of removing copper by both chemical and electroplating techniques but all I got was much shaking of heads and grim warnings of damage to the underlying metal.
As you suggest, a trial on some scrap parts might be the best idea.
At present, the Grant I mentioned is free of the majority of the copper and I think what little remains will be of interest rather than a minus point for sale.
However, if I get another one I will consider your suggestion very seriously.
Thanks.
