Before I started sanding I thought these floors were original to the 90 year old house, after I started sanding it became quite obvious that it wasnt original to the house. But "restoring Perhaps 35-50 year old boards" is just not as clickable! I hope you like it, please subscribe THE BEST LACQUER for Wood Floors (by FAR): https://www.amazon.com/gp/search?ie=UTF8&tag=beabrasive0c-20&linkCode=ur2&linkId=5a3c29881d16057fca811540ff84bc84&camp=1789&creative=9325&index=tools&keywords=bona%20traffic%20HD And the one thing everyone seems to forget when refinishing their floors: https://www.amazon.com/gp/search?ie=UTF8&tag=beabrasive0c-20&linkCode=ur2&linkId=1241ac22c2895053997fdd3fd0c1520f&camp=1789&creative=9325&index=tools&keywords=respirator If you want to get serious about refinishing your hardwood floors, do a good job and save money: http://howtosandafloor.com/video-course/ This description contains affiliate links. If you click them and purchase I will earn a commission.