Answer
3000 grit is for final ultra-fine wet sanding refinement after 2000.
Why it happens
3000 grit is an ultra-fine finishing grit used after earlier scratches are already refined.
Recommended grit
Use 3000 after 2000 for final wet sanding refinement.
Wet or dry
Wet for many fine finishing uses.
Success check
The surface has a very fine and uniform finish pattern.
What to do
- Use 3000 only after the surface is already refined.
- Keep water clean.
- Use very light pressure.
- Inspect the surface after drying.
Avoid: Do not use 3000 grit to remove heavy defects.