Cerium Oxide Polishing Compound is used for polishing and removal of fine scratches and scuff marks in glass and mirror. Easy to use, just mix powder with water and apply to the glass surface with the polishing felt to remove fine scratches. can be used to polish and restore lightly scratched windows, mirrors, tabletops ,glass tables, shower screens, fish tanks etc to like-new condition. Use Safety Accessories ( Like Hand Gloves, Eye Cover Goggle, Keep Away From Children ). Suggested Instructions for use (1)Supplies Needed: 1.Cerium Oxide 2.Water 3.Polishing Wheel 4.Electric Drill. (2)Directions: 1.Clean the area you're going to work on thoroughly. Be sure there is no dirt or grime on the glass, as this may result in additional scratches once you start buffing. (3) steps: Attach the dampened polishing wheel to your electric drill and dip it into the slurry. Place the polishing wheel on your work area, use small size felt wheel if scrach is near corner of windows ; keep the wheel moving in an up and down and circular motion. Be sure that the slurry does not dry up, as this could cause your glass to overheat and crack. If your slurry is becoming dry, you can spritz it with a spray bottle full of water. Notes: 1.Please note it is for light hair line scratches, surface marks, water stains .