Another faux mercury glass tutorial, by Take the Side Street. This one involves a vinegar/water solution plus the Krylon mirror paint.
DIY Mercury Glass Clean glass before starting. Spray glass (photo frame, recycled bottles, etc) lightly with water and then with mirror paint. Place on drying rack to let air circulate. Let dry completely, at least overnight. Repeat if too sheer. via martha stewart Love this, but click on picture and see Grinch "lightbulb" ornament. OMG this is great!!!!!!!