I finally got around to oxidising some of the silver jewellery I recently had 3D printed from Shapeways. Here are before and after photos of the results. The oxidisation process really brings out the detail and give it a lovely antique handmade look.
I used Liver of sulphur to oxidise the silver. It's very easy to use. Just add a few drop to some warm water and pop the jewellery in. The longer you leave it the darker it gets and then you have to give it a good polish with a silver polishing cloth. You can buy Liver of Sulphur from Amazon or most jewellery supply stores