This is what I did in MO. While camping in Issac.
it is on copper I sawed out the willow then using powdered glass I filled it in. I fired it with a blow torch.
The thing I like the most about this project is that it is easy to do and I can do it with minimal shopping. I am buying a Jewelers saw as soon as I have the money, but a basic coping saw with really tiny blades will do and very small drill bits. water mixed with the powdered glass (fine partial mask was worn) and for the acid just water, vinegar with salt, Baking soada and water for the base and water for a clean, and sand paper. things I can get easy. and I already have the torch and I even can grind some of my lamp working glass.