Over the years I have experienced some problems with the copper plating on my jewellery. I have to get this done in the trade & because it is small scale & small quantities not all companies will consider doing the work. In the past some of my jewellery has been cast, using the lost wax process, in a brass base which is then copper plated.
However I am now replacing that with bronze. Once the piece is cast I then polish each piece & use an oxidising solution to darken the surface & bring out the details of the surface pattern. It means I am now in control of the finish myself & it will save time in the long run hopefully! I think the finish is equally as nice as the copper as it still has a warmth & depth of colour.