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Old 09-01-2005, 10:26 AM   #1
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To sand or not to sand


Hi all. New kid here. I'm building a picnic table and I've sanded down the planks real nice, filled in the voids and I'm ready to paint. I intend to put numerous coats of polyurethane with a UV blocker on the wood. Here's the question. After each coat dries, do I need to scuff up the surface with some sandpaper before the next coat, or am I OK to just put 'em on one after the other? It's hi-gloss.

Thanks in advance,
Rich

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Old 09-01-2005, 10:47 AM   #2
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Usually a light sanding with a 220 is the proper procedure
You may be able to "get away with" not doing it, but I wouldn't recommend it

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Old 09-01-2005, 10:52 AM   #3
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No sense putting $20 urethane on $8 wood and not doing it the right way. Thanks for the advice.


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Old 05-22-2006, 06:30 PM   #4
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Always sand in between coats of poly. I recommend 320 grit...the results are smoother than 220. Also, before starting your projects, wait for a few replies on here, dont just listen to 1 or 2...wait a little.
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Old 05-22-2006, 07:14 PM   #5
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To sand or not to sand


When doing fine finishes with poly I use a 220 or higher on the first coat, then just a scotch pad on the rest. If you can keep the majority of the dust off the finish while it dries, a scotch pad should do well. Just knock off the gloss.
It really sounds like over kill for a picnic table but hey its you doing the work :-)
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Old 05-23-2006, 10:36 AM   #6
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To sand or not to sand


Quote:
Originally Posted by Paintguy26
Also, before starting your projects, wait for a few replies on here, dont just listen to 1 or 2...wait a little.
True, good call. But after 7 months or so, he probably assumed he got all he was going to get. Until you showed up. :D
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Old 05-23-2006, 09:43 PM   #7
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To sand or not to sand


You also need a UV resistant varnish and I'm not a poly fan especially on exterior finishes. Boat finishes are more adapted to exterior use and the 'spar' varnish at the box store is not marine varnish.

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