The floor is 20 years old or more and needs to be revitalize. My family and I have re-sanded 2 bedrooms, dinning rooms and family room. Afterwards we applyed a minwax oil base clear semi gloss poly to the 4 rooms. Then waiting 2 days we applyed a oil base clear poly to the rooms. After a day of dry time we realized that the floors has small bubbes and a little of discoloration. Then we re-sanded all the floors. Then we applyed a oil base clear semi gloss to the dinning room. The outcome of this floor is dissatisfying, would like advice on how to fix up the floors. There are also the old poly on the family room floor and wanted advise on the best way to remove it. I would like if anyone can give me advice on how I can fix up the floors. Thank You