HI, It's been a while but I think you can use liquid lead, or solder. Form the solder into simple shapes and then fill in with Elmer's school glue colored with food coloring. Simple and cheap. Make sure you are working on aluminum foil or something the glue won't stick to. Allow plenty of time to dry before trying to remove.
Besides the gallery glass you can use clear or white caulking with the liquid led, put a little on the clean glass and depending on how you spread it you can make different patterns on the glass.
Craft stores carry"liquid lead"and "glass paint". They both are in squeeze bottles. Hope you try it and it's not very hard at all. I did a small practice piece first. Enjoy.
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