I am renovating a 135 year old home and have found beautiful original wood flooring in several of the rooms. Unfortunately it is softwood. I am looking for information on how to properly refinish the flooring. I have heard of sanding the floor saving the dust and mixing it with a compound and spreading it over the floor to fill the cracks. Also I need information about what kind of sealant to put on it to protect the floor. Any suggestions would be greatly appreciated.