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My Armstrong engineered hand scraped hardwood floors have "cratering" that has just started showing up two years after being installed. What could be causing this and how can I rectify it? In addition, the installer left a scratch in my kitchen floor that is noticeable when the light hits it. Is there anyway to correct this, also?

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Can you post some pictures? – Steven Jan 24 '14 at 3:47
By "cratering" do you mean bowing. If so, without seeing it, my guess is the problem is the subfloor. Can you get under the floor to inspect? As far as the scratch, Lowes and Home Depot sell Minwax stain pens in various colors. I've used them for filling nail holes in floors I've put down. They look kind of like crayons. You smear some in the scratch then take a paper towel and shine the area glossy again. – getterdun Jan 27 '14 at 6:23

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