Have spent last weekend sanding the downstairs floors, using a sanding machine (drum). realised when looking to varnish the floor that the drum has left slight ruts in the floor, where the sanding machine was left standing.
The ruts are not very deep, as the machine was only standing for a shortperiod.
Was wondering if the whole floors need to be sanded again, if so is it better to use an orbittal sander? or use the drum sander again ? or perhaps use a belt sander just in the local vacinity of the dip?
Apprecaite your guidance.