Answer
For clear plastic scratches, wet sand with 1000, then 1500, 2000, and 3000 before polishing.
Why it happens
Scratches must be refined gradually because coarse marks are very visible on clear plastic.
Recommended grit
Use 1000 for light scratches, then 1500, 2000, and 3000 before polishing.
Wet or dry
Wet.
Success check
The plastic has an even fine haze with no deep scratches before polishing.
What to do
- Clean the clear plastic first.
- Wet sand light scratches with 1000.
- Refine with 1500, 2000, and 3000.
- Polish after sanding to restore clarity.
Avoid: Do not start with coarse grit on clear plastic.