Answer
For automotive wet sanding, use 1000, 1500, 2000, then 3000 with clean water and light pressure.
Why it happens
Automotive finish work usually needs gradual fine-grit refinement and clean water.
Recommended grit
Use 1000, 1500, 2000, then 3000 for fine wet sanding stages.
Wet or dry
Wet.
Success check
The surface has a uniform fine haze with no isolated deep scratches.
What to do
- Wash and rinse the surface first.
- Start with the finest grit that still corrects the issue.
- Use clean water and light pressure.
- Step finer only after the previous marks are even.
Avoid: Do not use coarse grit on clear coat without a clear reason and experience.