Speed
The premium Bona 8300 (grit 36) exhibits ultimate speed and toughness. Its unique zirconium mix completed the coarse sanding in only 59 minutes. When the Bona 8700 (grit 50) was used during coarse sanding, the total sanding time was 72 minutes, in second place, still faster than all other competitors despite its finer grit.
Additionally, start sanding with a finer grit enables the a total sanding sequence with fewer steps - a faster process in total.