What advice would you give someone starting this project? What I am going to say here is a bit controversial but here goes. I do not recommend aluminum for jewelry wear. Aluminum can be absorbed through the skin at low levels and I am not comfortable selling aluminum pieces or not telling folks that absorption and toxicity are possibilities, however remote. For most people a Cross is something they tend to wear constantly, which adds to my concern. Conversely, I love aluminum for things like key chains, holiday ornaments, and other non-jewelry functional items. I make these as key chains. That is my 2 cents and I am sure there are folks who think it is not worth that much, but I feel strongly that folks who I inspire or encourage should be aware of any issues, no matter their importance.