According to Storm, this is what you need to do to replicate their factory polished finish using a spinner:
1500-grit Polished Factory Finish
1. 500-grit pad – Sand firmly for 30 seconds on all four sides.
2. 1000-grit pad – Sand lightly for 20 seconds on all four sides.
3. 2000-grit pad – Sand lightly for 20 seconds on all four sides.
4. 4000-grit pad – Sand lightly for 20 seconds on all four sides.
5. Storm® Step Two™ – Polish lightly for 15 seconds on each side.