I'm going to start refinishing a wood floor this weekend and was looking at floor sanders. Nobody around here has one of the RO floor sanders to rent but they do have 12"x18" vibrating ones. Do they work good? I've used one of the drum types and almost had to replace the floor (not the same room). I need to sand all the finish (poly) off that wasn't worn off so I can apply something different. Which grit should I start off with? They start at 36 and go to 120. Any advice is definitely appreciated as I've only tried this once before and it was a nightmare!

Thanks,

Joe