A surface of 800, 1000, 2000 and 4000 mean's the ball is first sanded with 800 grit, you then follow that with 1000 followed by 2000 and finish with 4000.
The basic sanding steps:
1. 800-grit Abralon – Sand firmly for 30 seconds on all four sides.
2. 1000-grit Abralon – Sand lightly for 20 seconds on all four sides.
3. 2000-grit Abralon – Sand lightly for 20 seconds on all four sides.
4. 4000-grit Abralon – Sand lightly for 20 seconds on all four sides.
These steps can vary some what depending on MFG./person.
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