Painting on a slick surface such as a wine glass or vase requires glass paint and the knowledge of how to use it.
Decide whether you prefer translucent or opaque paint, and do not mix glass paint from two manufacturers as the paints differ chemically. Choose a kit that includes bottles, paint brushes, and instructions to learn the craft. Use a glass paint marker pen for detailing and outlining. Practise often so you become a skilled glass painter tackling intricate designs.