Glass markers are fantastic, versatile pens for decorating glass or glazed ceramic objects. POSCA Paint markers are some of the best glass markers around, with a wide range of tip sizes and over 30 colours available in some sizes. POSCA acrylic paint can be removed from glass, but to make permanent simply bake the object in an oven at 160°C for 45 minutes. Optionally, spray with clear varnish after baking for a final finish.