Answer
For brass or copper polishing prep, refine through 600, 800, 1000, 1500, 2000, and 3000, then polish.
Why it happens
Soft metals need scratches refined in small steps before polish can create shine.
Recommended grit
Use 600, 800, 1000, 1500, 2000, then 3000 before polishing.
Wet or dry
Wet for finer stages.
Success check
The surface has a uniform fine haze before polishing.
What to do
- Clean the metal surface.
- Start with 600 if scratches are visible.
- Refine through 800, 1000, 1500, 2000, and 3000.
- Polish after the scratch pattern is uniform.
Avoid: Do not polish over visible 600-grit scratches.