Amish made hardwood

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 Post subject: sanding before last coat of poly
PostPosted: Sat Aug 12, 2017 1:33 pm 
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Joined: Wed Aug 09, 2017 5:31 pm
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Hi all. I'm new here and I'm sure you can guess why. I installed a tongue and groove soft blue pine floor., about 700 sq ft. I sanded through 3 grits and am on my about 7th coat of minwax super fast drying poly. (lost count). After I started with the poly I could see that I have a fair amount of divets from the drum sander. Obviously not too deep or I would have seen them sooner. I have not sanded between coats. I was wondering about sanding with 220 before the last coat, but also wondering if it would really make a difference as the divets are deeper than the amount the sand paper (or screen) would remove. Seems like I would just hit the tops of the high spots. The dust nibs are not bad at all, but there are some areas where the poly is not as even as I would like it. If it would not make that much difference, I don't want to for various timing reasons (like company coming and i need the space, and I'm tired already).

Cynthia


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Amish made hardwood

 Post subject: Re: sanding before last coat of poly
PostPosted: Sun Aug 13, 2017 1:24 am 
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Joined: Tue Jun 16, 2015 12:02 am
Posts: 607
Too much finish will leave a floor with a greater chance of chipping. The wood will dent with pressure and a thicker film will not be as flexible so it may fracture. This can be the cause of chipping in the future.
If too long a time has passed between coats of finish the film will not have a chance to etch the fresh finish and adhere. Abrading between coats is a good idea. You will see less of a surface reflection with a matte finish.


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