Glass & Porcelain Opaque is an opaque paint for use on glass, porcelain and ceramics, available in 20 colours and sets. Including metallic colours!  As the paint is not transparent, it is used mainly on porcelain and ceramics. But also, on glass the opaque areas can create some extraordinary effects. Apply the paint using a sponge or flat brush or use sticks to create the dots. The painted object must be fixated by baking in a kitchen oven.