Hello everybody!

I was wondering if somebody might have a solution for me please? I use metal art clay and recently set a fireable CZ in a piece of jewellery, fired it and it was perfect. However during the polishing process, I've managed to scratch the surface so it now looks dull and has lost all the sparkle. Is there any way to get rid of the scratches and bring back the sparkle please?

I was wondering whether re-firing the piece might help? If not, is there some type of polish that might help?

Thanks in advance.