I made wedding bands for my brother and sister (in law) on the lathe at TechShop Detroit! I made them out of brass because it's cheap and easy to turn; then I had them molded and recast in more expensive metals. You should ABSOLUTELY try this! What a cool way to have a custom ring that can actually be cheaper than a comparable commercial ring!
The first part of this project uses basic lathe techniques - tried-and-true techniques you pick up when you take the Metal Lathe SBU class at the shop. Put to awesome effect!