Clean the area you're going to work on thoroughly. Be sure there is no dirt or grime on the glass, This is important as left over debris such as stucco or dirt may result in additional scratches once you start buffing.
Have two small plastic tubs ready; quart or pint sized containers work well. Fill one halfway with water.
Place The polishing pad on the vacker and deep the pad into the water; let it become thoroughly damp, but not dripping wet.
Put some of Cerium Oxide into the empty tub, and add enough water (about 2 to 1) to create a slurry (a thin, paste-like mixture).
Attach the dampened polishing pad to your electric drill or powered polisher and dip it into the slurry.
Place the polishing pad on your work area, use the smaller 3in size felt wheel if scrach is near corner of windowskeep the wheel moving in an up and down and circular motion.
Be sure that the slurry does not dry during use, 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.
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