The finish removal rate was judged after the sanding process. It consisted of
- coarse sanding with lower grit papers
- followed by coarse and medium sanding using finer grit papers.
For coarse & medium sanding
- Bona 8700 (grit 50) +Bona 8300 (grit 80)
showed equal removal efficiency as
- Bona 8300 (grit 36) + Bona 8300 (grit 60)
Closest competitor C (grit 36) and (grit 60) had good initial efficiency but soon lost removal performance.
Below chart shows how all tested abrasives performed: