pIf you would like to paint glass, whether its glassware, a window, a vase or a jar there are a few things to know ask yourself before you start. Will the piece be for decorative purposes or will it be exposed to heat or wear and tear? The answer /p
To paint over ANY surface, without sanding, use a product called ESP Easy Surface Prep, available at hardware and paint shops. Wipe on, wipe off and paint in 90 minutes. Works well over enamel paint , without having to sand. SAVES HOURS of work. It was recommended to me by a professional painter.