Yes it is possible many artists suppliers sell the enamels that are easily fused in a cheap pottery kiln, crafts stores tend to sell acrylics which don't need the fusing. Many potters are happy to fire things for people too, it only takes a few minutes and can allow much larger pieces than the hobbyist kilns would allow.
Won't be long before UV cured enamels are available and then you just need a cheap UV light box - although an epoxy type base it will be hard to distinguish from fired enamels as they to will be chemically bonded to the glass and hard.