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Old 04-15-2012, 01:53 PM   #1
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skim coat over wallpaper paste residue


I've taken down my wallpaper, and I've washed the walls with TSP as best I can, removing a lot of the old paste... I know that I missed some spots of glue so I decided to do a test on a small (3') area. I put Gardz up over the wall and blotch of paste. The paste seemed to get fuzzier or more pock marked after about 30 minutes. The Gardz is still not dry and has run/dripped in a few spots--I suppose maybe I over applied, though I was specifically careful to try not to do that.

My question in a nut shell is whether I have to actually remove all of this paste, or if "mostly removed" is good enough.

Meaning, once the Gardz has dried, do you think that I can successfully skim coat over the entire surface in preparation for doing primer and then top coat? I intend to use an oil base primer (any recommendations?).

Or, do I have to go to town scrubbing and soaking over the next several days to make sure as much of the paste as possible is gone?

Thanks

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Old 04-15-2012, 03:33 PM   #2
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skim coat over wallpaper paste residue


You should remove the paste--all of it---warm soapy water and a green scrub pad---

One of the painters will guide you on the best primer--I would not use an oil base myself---

If you skim coat,use all purpose (USG green lid) for the first coat--it contains glue and will bond the best---top coat with light weight (USG blue lid) if you wish--it sands more easily than the green lid.

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Old 04-15-2012, 04:30 PM   #3
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skim coat over wallpaper paste residue


As Mike said, you need to remove as much as possible. You do not need to get it ALL, but you need to get the worst of it. No need for an oil primer, the Gardz IS a primer.
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Old 04-16-2012, 07:33 AM   #4
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skim coat over wallpaper paste residue


Quote:
Originally Posted by chrisn View Post
As Mike said, you need to remove as much as possible. You do not need to get it ALL, but you need to get the worst of it. No need for an oil primer, the Gardz IS a primer.
I spent about 6 hours scrubbing the walls with a green sponge and soapy bucket... yuck.

But this post is about the test area with Gardz... I'm surprised this stuff is not being hawked as a miracle paint cure by Ron Popiel or the Slap Chop Guy... it's impressive stuff. I went back to my test area and sprayed it with hot water + soap, even after 30-45 seconds it wasn't getting sticky or slick. It took a good 30 seconds of scrubbing with the green side of the sponge to break through. I a quick 10 seconds over another area yielded nothing on the green side of the sponge...

So I'm feeling pretty confident that the green top compound I put on will stick and hopefully not have any issues. I do intend to go back over the test area with a second pass of Gardz when I do the rest of the walls.

After the skim coating is done, is better to use Gardz again, or just a regular primer?
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Old 04-16-2012, 05:10 PM   #5
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skim coat over wallpaper paste residue


[quote=bubbler;899999]I spent about 6 hours scrubbing the walls with a green sponge and soapy bucket... yuck.

But this post is about the test area with Gardz... I'm surprised this stuff is not being hawked as a miracle paint cure by Ron Popiel or the Slap Chop Guy... it's impressive stuff. I went back to my test area and sprayed it with hot water + soap, even after 30-45 seconds it wasn't getting sticky or slick. It took a good 30 seconds of scrubbing with the green side of the sponge to break through. I a quick 10 seconds over another area yielded nothing on the green side of the sponge...

So I'm feeling pretty confident that the green top compound I put on will stick and hopefully not have any issues. I do intend to go back over the test area with a second pass of Gardz when I do the rest of the walls.

After the skim coating is done, is better to use Gardz again, or just a regular primer?[/quote]



Up to you. If you need a pigmented primer the Gardz will not work.
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Old 04-16-2012, 07:20 PM   #6
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skim coat over wallpaper paste residue


[QUOTE=chrisn;900380]
Quote:
Originally Posted by bubbler View Post
After the skim coating is done, is better to use Gardz again, or just a regular primer?[/quote]

Up to you. If you need a pigmented primer the Gardz will not work.
What about

Original Plaster -> Gardz -> Skim Coat -> Gardz -> White latex primer -> Finish Coat (a light tan, almost ivory)

Or am I just making work for myself with both Gardz & latex primer?
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Old 04-17-2012, 02:55 AM   #7
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skim coat over wallpaper paste residue


No need for the white primer, TWO (2) finish coats

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