Instead of regrinding polished concrete that is looking tired/dirty, refresh it with Simix

1. Remove guard coat with stripper and 220 grit diamond pad on floor machine/scrubber
2. Apply 4 coats of Simix Ceramic Floor Coating
3. Burnish with 1800 grit diamond pad
4. Dust mop
5. Add more coats as needed
6. Burnish with buff (8000 grit) diamond pad