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Old 12-19-2012, 09:04 PM   #1
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sanding primer ?


i am in the process of muding my new drywall. looks like i am not as good at it as i would like . so i know that there will be imperfections, even after i give it a good look over before primer. so, once i prime it, will i be able to sand down high spots ? i believe i will be able to put more mud on top of primer ? to fill low spots ?
i am focusing on one wall, so i can keep my errors in one place, and limit future errors.
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Old 12-19-2012, 09:46 PM   #2
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sanding primer ?


When you sand ( before priming), have a trouble light in your hand and hold it at an angle. When you do it you will see what I am saying- it will improve your sanding a billion percent.
After you prime, do the same with the light and touch up with mud where it needs it, repeat process, reprime.
With practice it will get better!
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Old 12-20-2012, 05:21 AM   #3
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sanding primer ?


Fix, I'll add to BJ's always sage advice. Sanding is always a two handed job, one sanding and the other feeling for what needs to be sanded and for results your sanding is achieving.
It's always better to sand high spots out prior to priming, and it's better to spackle out low spots after priming or, if they're obviously low enough, before you prime.

Sanding out a high spot will break the "skin" of the primed surface and create a situation requiring a skim coat.
Using a light from the side will throw shadows and highlight imperfections on the surface.
Don't feel bad, after priming spackle touch up is pretty much expected and routine, even for the pros. Prep isn't finished until you're rolling the final coat on, and even then I've been known to knife some caulking or lightweight vinyl spackle, which can be painted over immediately, into picture holes or small dings while I'm finish coat rolling.
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Old 12-20-2012, 07:27 AM   #4
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sanding primer ?


Knock off any ridges then using a 12" drywall knife put on a thin coat of Lightweight #3, or drywall topping mix, or the new ultra lite mud. Any of these 3 are a lot easier to sand than all purpose, and the 12" knife will feather your mud out farther and will help eliminate high spots.
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Old 12-20-2012, 07:23 PM   #5
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sanding primer ?


if your work isnt as good as you would like then go over it again giving it a skim coat, there is no rule saying you can only do 3 coats. then do what brushjockey says.
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Old 12-20-2012, 08:27 PM   #6
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sanding primer ?


ok guys, thanx for the advice. i will try all of those things.

while i do not feel that all purpose is hard to sand. when there is a lot of sanding to do, anything that makes it go faster is a real help.
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Old 12-22-2012, 09:32 AM   #7
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sanding primer ?


i now have a bucket of SHEETROCK ultralightweight all purpose. . have yet to try it. probably today.

what a mess
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Old 12-22-2012, 09:47 AM   #8
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sanding primer ?


Please let us know how it works for you I seem to be the only one that has tried it. Would be good to hear some one else's opinion.
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Old 12-22-2012, 09:53 AM   #9
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sanding primer ?


Rolling baker and the whole deal- you got it going on!
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Old 12-22-2012, 09:55 AM   #10
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sanding primer ?


The light green lid? What does it do that Plus3 doesn't ( blue lid)
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Old 12-22-2012, 10:01 AM   #11
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Quote:
Originally Posted by ToolSeeker View Post
Please let us know how it works for you I seem to be the only one that has tried it. Would be good to hear some one else's opinion.
sure will.

Quote:
Originally Posted by Brushjockey View Post
Rolling baker and the whole deal- you got it going on!
wth is a rolling baker ? the scaffold ? i got that for $60 on CL = excellent buy
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Old 12-22-2012, 10:33 AM   #12
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sanding primer ?


Quote:
Originally Posted by Brushjockey View Post
The light green lid? What does it do that Plus3 doesn't ( blue lid)

imo the blue is the way to go
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Old 12-22-2012, 10:37 AM   #13
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Quote:
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wth is a rolling baker ? the scaffold ? i got that for $60 on CL = excellent buy
Yup- That is called a bakers scaffold- skinny and interior compared to the big square ones usually used on outside.
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Old 12-22-2012, 01:02 PM   #14
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Quote:
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The light green lid? What does it do that Plus3 doesn't ( blue lid)
It's a lot lighter and easier to use you don't need to add water to loosen it up just stir. It's a lot easier to sand, it's almost like topping if you have ever used that.
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Old 12-22-2012, 01:30 PM   #15
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sanding primer ?


Plus 3 is about as soft and easy sanding as I'd want- I haven't seen that product- and will look for it.
Its all made by USG it looks like- so they wouldn't compete with themselves- must fit a need that I personally don't see yet- so I'll check it out when i can.
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