Spreading jewellery purchases?

Thanks for your answer! I am a bit afraid to get it polished because you always lose a bit gold. Wouldn't it be possible to recoat the bracelet?

It's a very small amount, I think it's a sacrifice you have to make if you want it to look new and shiny again.

I don't believe they are coated in anything. Well the WG I imagine is probably coated in rhodium, but not the RG or YG. You could get platinum, polishing doesn't result in a loss of metal with it.