Answer
For acrylic bathtub scratches, wet sand lightly with 800 or 1000, then 1500, 2000, and 3000 before polishing.
Why it happens
Acrylic is softer than ceramic or porcelain, so deep grit marks can be difficult to remove.
Recommended grit
Use 800 or 1000 for light scratches, then 1500, 2000, and 3000 before polishing.
Wet or dry
Wet.
Success check
The scratch is reduced and the surface has an even fine haze before polishing.
What to do
- Clean the tub surface first.
- Wet sand lightly with 800 or 1000.
- Refine with 1500, 2000, and 3000.
- Polish with a plastic-safe polish after sanding.
Avoid: Do not use coarse grit on a visible acrylic tub surface.