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The judging of the coarse sanding performance was conducted through careful, close-up observation of the surface. This observation was then repeated after medium grit sanding.
Many abrasives in the market originate from the metal sanding industry. These can be effective in removal but are too aggressive to the wooden floor surface. Fibres are usually ripped from the surface during sanding and create deep scratches, which are difficult to remove with a medium grit paper. This results in a longer time taken to complete the entire sanding process, consisting of coarse, medium and fine sanding.
Using the
for coarse sanding resulted in
on the floor surface, which saves time during medium and fine sanding.
This is how all tested abrasives performed regarding surface quality - see below chart: