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Bob Guercio 05-30-2012 08:23 PM

Sanding and Painting
 
Hi All,

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

Thank you,
Bob

Bob Mariani 05-30-2012 08:42 PM

100 0r 1500... depends on what type of paint and what you are painting.

Bob Guercio 05-30-2012 09:18 PM

Quote:

Originally Posted by Bob Mariani (Post 932525)
100 0r 1500... depends on what type of paint and what you are painting.

Interior smooth walls with Benjamin Moore Satin finish.

Bob

joecaption 05-30-2012 09:29 PM

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.

Bob Guercio 05-30-2012 09:40 PM

Quote:

Originally Posted by joecaption (Post 932579)
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.

Bob

Windows 05-30-2012 10:10 PM

I generally use 120 grit on the pole-sander.

jsheridan 05-30-2012 10:49 PM

Quote:

Originally Posted by joecaption (Post 932579)
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

user1007 05-30-2012 11:05 PM

Quote:

Originally Posted by jsheridan (Post 932640)
Technically, you're wrong.

Yet again.

chrisn 05-31-2012 04:12 AM

Quote:

Originally Posted by sdsester (Post 932666)
Yet again.


What else is new?:censored:

pucks101 05-31-2012 10:45 AM

Quote:

Originally Posted by joecaption (Post 932579)
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?

chrisn 05-31-2012 06:02 PM

Quote:

Originally Posted by pucks101 (Post 932974)
You really don't routinely do a quick sanding before paint?


He , for the most part, knows nothing about painting properly:no:

user1007 05-31-2012 06:24 PM

Quote:

Originally Posted by chrisn (Post 933271)
He , for the most part, knows nothing about painting properly:no:

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. :thumbsup:

ltd 05-31-2012 07:14 PM

Quote:

Originally Posted by joecaption (Post 932579)
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 :no: imho

jsheridan 05-31-2012 09:40 PM

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.

Davejss 05-31-2012 09:47 PM

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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