Hi I'm hoping someone out there can help.

I have used a piece of 0.5mm thick argentium for a small chasing and repousee piece. All seemed to be going ok but when I finished there were some small bits of red german pine pitch left in some of the very fine lines that I was struggling to get off so I decided to burn it off which went ok but the argentium went a grey brown colour, I have pickled this and it is now more silver in colour, but has a yellowy cast to it and a couple of small patches of dark grey! This is the first time I have used this and can find very little information about it, its certainly not the very white silver I was expecting.

Any ideas?

Thanks Carrie