Remove existing coatings (for thick coatings, use a 16- or 20-grit diamond abrasive or more aggressive tool specifically for coating removal, such as a T-RexTM).

Seal cracks and joints with an epoxy or other semi-rigid filler.

Grind with a 30- or 40-grit metal-bonded diamond.

Grind with an 80-grit metal-bonded diamond.

Grind with a 150-grit metal-bonded diamond (or finer, if desired).

Apply a chemical hardener to densify the concrete.

Polish with a 100- or 200-grit resin-bond diamond, or a combination of the two.

Polish with a 400-grit resin-bond diamond.

Polish with an 800-grit resin-bond diamond.

Finish with a 1500- or 3000-grit resin-bond diamond (depending on the desired sheen level).

Optional: Apply a stain guard to help protect the polished surface and make it easier to maintain.