I purchased an old house with approximately 900 sq. ft. of hardwood flooring. It is in relatively good condition but needs a new finish. I am going to rent an oscillating sander with a 12" x 18" pad. I asked the rental place how much sandpaper I need and they had no idea. I can buy the sandpaper much cheaper through a retailer than what the rental place charges so I want to buy it ahead of time. I have no idea how much to order. I am planning on using three grits: 36, 60 & 80.
Can anyone give me an idea from experience on how much I should order? I don't know if I will need five sheets of each or twenty. Although I think I will need more of the 36 than the others.