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Old 05-30-2012, 08:23 PM   #1
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Sanding and Painting


Hi All,

What grit sandpaper should be used prior to the final coat of paint?

Thank you,
Bob

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Old 05-30-2012, 08:42 PM   #2
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100 0r 1500... depends on what type of paint and what you are painting.

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Old 05-30-2012, 09:18 PM   #3
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100 0r 1500... depends on what type of paint and what you are painting.
Interior smooth walls with Benjamin Moore Satin finish.

Bob
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Old 05-30-2012, 09:29 PM   #4
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Unless your seeing some flaws that need to be fixed or there's something your not telling us there's no need to sand before the finished coat.
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Old 05-30-2012, 09:40 PM   #5
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Originally Posted by joecaption View Post
Unless your seeing some flaws that need to be fixed or there's something your not telling us there's no need to sand before the finished coat.
I need to sand after spackling and often there are slight imperfections that need to be smoothed out.

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Old 05-30-2012, 10:10 PM   #6
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I generally use 120 grit on the pole-sander.
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Old 05-30-2012, 10:49 PM   #7
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Originally Posted by joecaption View Post
Unless your seeing some flaws that need to be fixed or there's something your not telling us there's no need to sand before the finished coat.
Technically, you're wrong. A sanding should be done prior to applying any coat, especially with a sheen like satin. Under the right lighting, a satin finish will highlight the smallest debris on a wall. From the can to the wall, and even some come out of the can with debris in it, the paint picks up dirt from the wall, fuzz from the cover, stuff from your shoe if you step over the pan (which you should never do), dust from the air after the paint is applied, etc. Without a sanding, by the time the second coat dries, you now have two layers of debris, rather than one. And now your wall will feel and might look like fine sandpaper. It's good practice to sand between coats, at least as high and low as you can reach standing.
To your question Bob, by the way how are you, I wouldn't use anything stronger than 150 or 180 on a satin. If the paper is too strong you could end up putting scratches in the first coat which might be visible after the second. 120 would be okay with a flat. That's for general sanding of the paint. For the spackle, lightly hit it with the 180 or use 220.
Take care
Joe
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Old 05-30-2012, 11:05 PM   #8
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Technically, you're wrong.
Yet again.
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Old 05-31-2012, 04:12 AM   #9
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Yet again.

What else is new?
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Old 05-31-2012, 10:45 AM   #10
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Unless your seeing some flaws that need to be fixed or there's something your not telling us there's no need to sand before the finished coat.
You really don't routinely do a quick sanding before paint?
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Old 05-31-2012, 06:02 PM   #11
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You really don't routinely do a quick sanding before paint?

He , for the most part, knows nothing about painting properly
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Old 05-31-2012, 06:24 PM   #12
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He , for the most part, knows nothing about painting properly
Such knowledge is irrelevant if you advise to replace anything and everything with vinyl. Rough er up with 60 grit and glue gun in place. You will never have to paint again.
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Old 05-31-2012, 07:14 PM   #13
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Unless your seeing some flaws that need to be fixed or there's something your not telling us there's no need to sand before the finished coat.
ok i always was the one when all the kids liked chevys i liked mopars.it looks like i'm in the minority again. after a thorough sanding and clean up and using a clean 5 gal. set up ,new cover rinsed and spun ,i see no need to sand again .after your first coat cover set up with a damp rag .i feel that sanding a second time your are putting more dust in to the work area for no good reason .as far as the paint sticking i never had a problem ,and am all about adhesion.hey that's not to say on second coat i don't look down the wall and hit an area wit the 180 folded up that i carry in my back pocket , but to say i sand completely before final coat imho

Last edited by ltd; 05-31-2012 at 10:20 PM.
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Old 05-31-2012, 09:40 PM   #14
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LTD, I don't know what others are thinking, but I'm not talking about a huge project. It takes all of about 5-10 minutes to walk the walls and run sandpaper up and down as far as you can reach standing.
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Old 05-31-2012, 09:47 PM   #15
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When I'm painting interior walls I go over tham quickly with a damp sponge to remove dust, cob webs, etc. If there are areas that need to be filled, such as nail holes from hanging pictures I fill with a small amount of joint compound, let dry and feather it off with a damp sponge. No sanding and no dust.
Then prime if necessary and top coat. No sanding needed unless it's newly hung drywall. Even then it's up to the tapers to leave a paint-ready finish.

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