I'm currently making a ring using 14ct yellow gold...any ideas why when I file/sand it is it going a red gold colour?! It's not plated. Could it be some kind of fire stain? It has been a heated quite a few times... Here's a photo where you can (hopefully) see what I mean.
I'm lost! How do I get it back to being an even yellow colour all over? It's extra fiddly to get an even finish because it's got raised edges...
Thanks you, any suggestions appreciated
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