Hi Trevor
If sanding, remember the following:
* Punch in any nail heads in that are showing below floor surface.
* Make the first out going with the grain. Do not apply too much pressure as this will tend to score the floor.
* Sand complete area, and make turns diagonally, NEVER at 90o to the grain. On NO account should the sander be moved accross the grain of the wood!!
* Start with a courser paper to begin with, then finish with a finer grade paper which should eliminate any scratch marks.
*Vacuum dust away afterwards, in preperation for sealing afterwards.
* Sealaccording to manufacturers directions
All the best
Tim