Just tried doing faux stained glass. I'm pretty pleased with the outcome. And I had a lot of fun making them.
I used Plaid Gallery Glass Paint from Michaels - paid $15 for a set of 31 colors including the liquid leading which creates the look of real leading lines. They are water based and non toxic. They are easy to make but require some patience and extra care. I had to wait at least 8 hours before applying the glass paint to allow the black liquid leading to dry.
Stain Glass Carousel coffee mug (Google Ad)