Answer
For plexiglass edges, use 320 or 400 for cut marks, then 600, 800, 1000, 1500, and 2000 before polishing.
Why it happens
Saw or cut marks need a gradual sanding sequence before polishing the edge.
Recommended grit
Use 320 or 400 for cut marks, then 600, 800, 1000, 1500, and 2000.
Wet or dry
Wet for fine stages.
Success check
The edge has an even fine haze before polishing.
What to do
- Start with 320 or 400 only if cut marks are visible.
- Refine through 600, 800, and 1000.
- Use 1500 and 2000 for a finer edge.
- Polish after sanding for clarity.
Avoid: Do not use heavy pressure that heats or chips the edge.