Answer
For brass hardware, use 600, then 800, 1000, and 1500 before polishing.
Why it happens
Polish works best after scratches and oxidation are refined with fine sanding steps.
Recommended grit
Use 600 for oxidation or scratches, then 800, 1000, and 1500 before polishing.
Wet or dry
Dry or wet at finer stages.
Success check
The brass has an even fine scratch pattern before polish.
What to do
- Clean the brass hardware.
- Sand oxidation with 600.
- Refine with 800, 1000, and 1500.
- Polish after sanding.
Avoid: Do not polish over deep 600-grit scratches.