Answer
For Plexiglass edges, use 400 or 600, then 800, 1000, 1500, and 2000 before polishing.
Why it happens
Acrylic edges need a gradual fine sanding sequence before polishing.
Recommended grit
Use 400 or 600 to remove saw marks, then 800, 1000, 1500, and 2000 before polishing.
Wet or dry
Wet for fine stages.
Success check
The edge has a uniform fine haze and is ready to polish.
What to do
- Flatten heavy saw marks with 400 or 600.
- Refine with 800 and 1000.
- Continue with 1500 and 2000.
- Polish the edge after sanding.
Avoid: Do not use heavy pressure that heats the acrylic edge.