Gilding after silver soldering

[AlanB]

When faced with say a pocket watch bridge which is cracked, silver soldering to repair is often the only option (hopefully someone wasn't there before hand with soft solder). I can generally do this succesfully and tidily with a small torch and miniscule pieces of silver solder, but on parts which were mercury amalgam gilded the heat can have have a deleterious effect on the finish.  

I keep wondering if there's a good way to refinish these - and despite having the needful items would rather avoid using the mercury process.  

In the past for electronic work I've gold plated PCBs but this involved gold potassium cyanide solution, which also doesn't realy belong at home. I've read that there are now safer alternatives but couldn't find more detail (and importantly how similar are the results to amalgam gilding, since I wouldn't want to refinish the whole watch).

Pointers would be very welcome (and yes, I know solutions containing gold won't be cheap!)

Alan