RECOMMENDATIONS
On drum machines, we recommend to decrease the tension of the abrasive when sanding with fine grits (P60 and finer). The rubber drum will thus act softer and produce a better finish.
The abrasive should be replaced as soon as its cutting action decreases. This will ensure a smooth and constant surface finish.
Carefully select the grit size according to the amount of repair needed on the floor. Grits which are too coarse may cause more damage and result in the work taking longer to complete, whereas grits which are too fine will not remove material as quickly therefore causing delay where the surface requires a large amount of work.
Do not, as a rule, make successive passes with abrasives more than 2 grit sizes apart. It is preferable to make the last sanding pass with a disc machine. According to the type of wood, use grit sizes P80 - P100 or P120.
Before each pass, carefully sweep the floor, so that the abrasive will not be damaged by wood and abrasive swarf left on the surface.
The final sanding passes must be make along the grain direction and towards the light. Changes in sanding direction should be made preferably on less areas.