Hello. We had the 94 year old floors in our new house refinshed and stained. We had some chatter or wave marks (not sure the difference) upstairs (semi-gloss finish), which the refinisher said was a result of boards not being secured to the subfloor. On the main floor we went with satin finish and chatter marks were better but not eliminated. Our bigger concern is a four foot "puddle" in the dining room where the stain is lighter than the surrounding area, with a line around the perimeter (see picture below) Are these lapmarks? The refinisher said he sees the issue, and says the only way to fix it is to resand. We did not discuss whether he was willing to do this or not.
The DR flows to the foyer and living room. We are also aware that with these old floors there is a limit to how many times they can be resanded. Questions: Should we require the refinisher to redo the dining room (part or whole), or are we risking even worse results trying to blend into already finished areas? Should we consider hiring another refinisher, or are these issues a result of the age of the floor (vs quality of refinisher)? Would another reputable company ever be willing to 'fix' the mistakes of another refinisher? Any advice is appreciated. See pic below.https://www.dropbox.com/s/bk0tsxtti5dk2 ... s.JPG?dl=0