I am looking for a bit of help with this one as I mainly work with silver and have only done a few gold bits of jewellery.

I have been asked by a friend to re design her 18ct yellow gold wedding band as it no longer fits her. She would like me to use part of the original ring in a newly designed 18ct white gold ring.

My question is can you solder both metals together and if so what solder to use? Is this and easy task or are there issues with different melting temps? and can you plate the white around about the yellow?

sorry for all the questions lol but I really don't know much about gold hopefully someone on here does