ive been told the goldy areas is whats called 'nickel blast' its something to do with the shape of the anodes and diodes used in the process, it can be done, but the chromer would have to buy in a special shaped anode for the bb area, costing bout £500 ,so therefore not many platers will do this for one offs. however, bitd, when everythin was plated, the platers would have these anodes as standard, i bet theres loads knockin round in the states, maybe a big corp' could be the answer and we could them to each other? hope this helps, cheers fog.