Hardwood Floor Refinishing Problem

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Old 08-07-19, 12:01 PM
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Hardwood Floor Refinishing Problem

We recently had our white oak floors refinished. There are quite a few areas that resemble the photo attached. The surface feels smooth but the wood looks rough like there’s dust trapped under the polyurethane as pictured.

My questions are:
Any idea what caused this?

Is this acceptable? If not, how can it be fixed?
Apologize for the shadows in the picture but it was hard to find an areas with the defect that photographed well.

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Last edited by PJmax; 08-07-19 at 02:05 PM. Reason: resized picture
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Old 08-07-19, 12:24 PM
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Hard to tell from the pic what you have going on. Generally if the finish is smooth there isn't much else you can do short of refinishing. If it's something than can be lightly sanded out sometimes you can get by with buffing out the fine sanding scratches with wax.
 
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Old 08-07-19, 01:45 PM
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I uploaded a higher res image. Hopefully that will help.
 
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Old 08-07-19, 02:06 PM
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The board can't handle hi res right now. It just crashes the picture resizing software.

Your picture is good. It looks to me like there are air bubbles in the finish.
 
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Old 08-07-19, 04:38 PM
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It looks like bubbles or dust in the finish. You can use a very fine sandpaper to knock down the bumps. You may have to try some different grits for the final finishing to get the sheen to match the rest of the floor.

Most home centers only stock a few sandpaper grits and even the finest is rather course. If you go to an auto parts store that sells auto painting supplies they will have many more, finer grits to choose from. I'm guessing you might want to end up with about 600-800 grit to give a sorta satin finish.
 
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Old 08-08-19, 02:35 AM
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the new pic is better

I'd sand it with 320 grit and then buff with wax.
 
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Old 08-08-19, 12:46 PM
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The contractor came by today and said that the sealer must have dried too quickly causing orange peel. He said he spent 4 hrs polishing it with 400 grit paper. I guess that explains why the surface is smooth in spite of the rough appearance. He doesn’t know how to fix it. I suspect the fix is to take it down to bare wood and start over again.
Any other ideas?
Thanks everyone for your comments.
 
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Old 08-08-19, 01:26 PM
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He shouldn't need to sand it down to bare wood but it may require sanding off a coat or two of poly and then applying fresh poly.
 
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