A good majority of our floor restoration projects usually require a 36-40 grit abrasive, it may also be necessary to begin sanding at a 25-45 degree angle, depending on how flat the Floors are. In doing so it will help to level the floor and take out any cupping if present. The second step of the wooden floor restoration is to then sand the Floors with the grain. It’s important to use the same grade of abrasive for this as it will ensure all previous diagonal scratches are removed. After this we move on to a medium grade abrasive, say 50-60 grit, which for our money is one of the most crucial parts, as it is this step that will help transition the floor from rough to medium. Besides, this also helps to smooth out any marks left from the previous process. For the final part of the restoration process we use fine abrasives, usually 80-120 grit (depending on wood species). This leaves the surface of the wooden floor smooth to the touch and almost, ready for finishing.