Heres the Scenario, he scoured the floors with a buffer and a water based cleaning soultion then let it dry. From then on he sanded the floors down with a 120 grit, then to a 220 grit, because the floors hadnt been finished prior, so it was fairly easy...the only down fall was the floors are pine and it became cupped where they are joined by the tounge and groove, so when he was sanding (with out taking a good portion off the floor), he couldnt get it flat. That being said there were coloration differences so he couldnt just throw down a poly, it wouldnt look unified, so he went with a stain. His wife went to lowes and got a min wax water based stain they suggested to her and it was for furniture not hardwood floors... so before he realized it, he had applied it to the 1700 sq. ft of his hardwood floors and after it dried it looked like crap! so he tried to sand down the overlap marks and blend it in... which made it worse. so he went back to lowes and they gave him his money back plus some for inconvience, now the real question i have to sand down the stain again... and start all over, but... if he uses a fine sandpaper is it possible to sand down the stain to a white wash (by the way the color is desert sand) blend it nicely then poly? or is he flat out screwed and has to sand down to natural wood again?