Electroforming! This is the process I use to make many of my free-form copper pieces. When I first started experimenting with this process I ran into SO many problems and couldn't seem to find much information about it. Now that I feel like I know what I'm doing, for the most part, I thought I would share what I've learned with whomever wants to read.
How to Use a Dremel / The Dremel Bit Guide (this post is great for figuring out what bit to use on a project-- plus it gives you ideas on what to do with your Dremel tool):
Make Custom Jewelry Findings, Part Two: 6 One-of-a-Kind Wire Clasps - Jewelry Making Daily - Jewelry Making Daily