Hi,

I made a few pendants and for the first time I used my pendant motor to pre-polish using Yellow Luxi before putting them in the tumbler with stainless steel shot for the final polish. When I polished the pendants they had a near mirror surface, absolutely beautiful. I scrubbed them with a soft toothbrush and dishwashing liquid before tumbling. After tumbling they still had a very shiny finish. This was yesterday. I checked them today and some of the pendants have developed a kind of grey blemish in areas and I can't figure out what it could be. I don't think I missed it yesterday. The strange thing is, it's only noticeable when you hold the pendant at certain angles.

It can't be fire stain can it? I thought it would show up at the pre-polish stage.

Any ideas as to what it could be?

I appreciate any help/advice you can give. Thanks in advance.