3M Roloc disks. Sanding disks will take the paint right off.... but don't get very heavy ones or you'll be sanding to try and get the deep scratches out. Or use the rubber ones. They take longer, but work. They are way more expensive. If you don't have a die grinder, you'll need one. That's what they attach to. You don't want to use a drill, doesn't spin fast enough.
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