Now you are ready to turn your glass in to a mirror! (Pause here while you tingle with anticipation.) Be sure the glass is clear of finger prints or dust. The Looking Glass Spray is VERY smelly stuff so relocate to a well-ventilated area and cover your work surface with something to catch the excess spray. You will need to spray the paint on the back side of the glass, using a sweeping side-to-side motion and moving quickly. To avoid an uneven appearance apply five thin coats and wait at least a full minute or more between coats. I found if I held the can closer than a foot the paint rippled from the air pressure . The paint looks rather dull grey but the opposite side is where the reflective quality is apparent.