You will need a supply of DA Disc. An average job will take about 5 - 80 grit and 10 - 180 grit disc. You may also need some 36 grit for rust removal or quick grinding to metal. We use the "Stik-It" disc that mount to a special backing pad. They are also available in a "Hook-It" series which is nice that you can remove and reuse without tearing the sheet.  

Paint Your Own Car - Supplies Needed