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Old 04-02-2013, 08:29 PM   #16
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Dry Wall Prep?


Personally I don't get the water wipe at all. Use a vacuum, a swiffer dust mop, a broom. I have never used water to clean a raw wall. Sounds like asking for trouble and a very inefficient way to get it ready.

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Old 04-02-2013, 08:44 PM   #17
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Dry Wall Prep?


I don't really get it either, the only time I wash walls is after I remove paper. I'm just trying to steer the bullet to the fleshy part of his foot, lol.
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Old 04-03-2013, 01:49 AM   #18
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Dry Wall Prep?


Unless I read something wrong. This is not new drywall. It is has been sitting, in a garage and turning color because nothing was applied to it when it was new drywall---12 years ago. From the original post:

"The dry wall has been sitting like this for 12 years now." is what I read in the original post.

I am not suggesting to soak it with TSP but stuff like primer and paint is not going to stick to it now without some attention to trying to clean it? Unless the car, truck, boat, lawnmower, weed wacker, snow blower, etc. was always moved outside before starting? I am sorry but just vacuuming it or hitting it with a damp sponge is not going to end well in this situation. IMO.

Two coats of primer is not going to help an uncoated, decade-old piece or two of drywall in a garage on its own either?

Last edited by user1007; 04-03-2013 at 03:00 AM.
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Old 04-03-2013, 03:20 AM   #19
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Dry Wall Prep?


Quote:
Originally Posted by sdsester View Post
Unless I read something wrong. This is not new drywall. It is has been sitting, in a garage and turning color because nothing was applied to it when it was new drywall---12 years ago. From the original post:

"The dry wall has been sitting like this for 12 years now." is what I read in the original post.

I am not suggesting to soak it with TSP but stuff like primer and paint is not going to stick to it now without some attention to trying to clean it? Unless the car, truck, boat, lawnmower, weed wacker, snow blower, etc. was always moved outside before starting? I am sorry but just vacuuming it or hitting it with a damp sponge is not going to end well in this situation. IMO.

Two coats of primer is not going to help an uncoated, decade-old piece or two of drywall in a garage on its own either?
Why not?
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Old 04-03-2013, 03:40 AM   #20
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Dry Wall Prep?


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Why not?
First coat of primer needs a clean surface. Second one on top of it over something not prepped will not help. I am just saying you cannot treat a piece of 12-year old drywall, never protected in the first place, like you would new drywall. Am I wrong?

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Old 04-03-2013, 06:41 AM   #21
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Dry Wall Prep?


Wetting drywall and mud ( what I should have said was raw, not new) will not clean it.
Give it a try.
if the dirt had absorbed into it, they are so porous no light washing will do anything . I would give it a light sand- finish the mudding and do exactly what the op is doing- 2 coats ( overnight dry) of 123 PLUS ( WB oil). If excessive stains bled through the first, might change to oil for the second coat.

With waterborne stain killers, often you let them bleed into a first coat which then locks them, second will finish them off. Not true for all stains, but i have had reasonable luck with Smart Prime ( aka 123 plus). If you have smaller select areas of bleed through, I would spot hit them with BIN and then do the second coat. I don't love massive amounts of solvents...
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Last edited by Brushjockey; 04-03-2013 at 06:50 AM.
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Old 04-03-2013, 09:58 AM   #22
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Dry Wall Prep?


Thanks for all the suggestions guys. I think I am going to do what I planned. The damp sponge mop is not to really clean the walls, I know nothing will clean the paper of drywall, it's just to help take off all the accumulated dust from the sanding and years of being there. Hopefully everything will come out OK.


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Old 04-03-2013, 04:55 PM   #23
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Dry Wall Prep?


Quote:
Originally Posted by sdsester View Post
First coat of primer needs a clean surface. Second one on top of it over something not prepped will not help. I am just saying you cannot treat a piece of 12-year old drywall, never protected in the first place, like you would new drywall. Am I wrong?

nope, I just miss interpreted

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