Hello. Decorative painting? I painted 36 glass mason jars with Folk art multipurpose.
This paint is rated for glass needs to be baked on.
Plaid has a whole page on glass paint products I would look there or call their support line. They are very educational and helpful
In my case I painted a white background first then the blue flower on top. It’s have a nice clean background ( rear view) as well as support the flower true color and prevent streaky look. I painted My in waves painting one single color at a time which allowed the paint to dry and cure -this system work very well for me
Additional references that helped me with regular ( non glitter) paint glass painting.
I hope this helps!
There are some cool paints that look like stained glass when you paint on clear glass: https://decoart.com/glass-paint/glass-stain
There are paints made for glass, and I would read their instructions.
Amazon & EBay have them.
Here's some tips for spray paint: