On Sep 18, 10:09*am, Davej wrote:
Went to Home Depot yesterday and see they have two sanders for rent.
One is a belt sander and the other is a large orbital. Both are
intended for floors. I just need to take the varnish off an old floor.
Is the big orbital the best tool for this? The room is 15x20ft. Any
idea how long this will take me or suggestions on the grit to begin
with? Thanks.

Wood oxidises, to get it to look best you need to sand to new wood,
the belt sander is best, the orbital is used inbetween coats of Poly,
or as a cleaner-buffer on different types of floors.