Krylon K09033000 Looking Glass Mirror-Like Aerosol Spray Paint, 6-Ounce by Krylon, http://www.amazon.com/dp/B003971BAY/ref=cm_sw_r_pi_dp_408rrb1VN3G5Q Thinking of finding a picture frame, painting it and spraying the glass with this to make a mirror. One person commented that the back of the glass must be sprayed and not the front.
Looking Glass®- Mirror Like Paint - get the look of mercury glass with a spray-on mirror finish. Lightly spray water inside clean vases, then spray the same area with paint. Turn upside down to dry. For a heavier finish, repeat.