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Old 04-18-2009, 04:25 PM   #1
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paint problem

I primed the walls in a small bedroom with Zinsser 123. While rolling I began to notice some spots where the paint wasn't sticking. It happened in several areas, always where there was a repair from many years ago.
Prior to starting to paint I sanded all the walls and filled holes/dings with drywall mud. Wiped down all surfaces with a damp sponge after vacuuming. Everything was dry before I started priming.

Any ideas what is going on here?


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Old 04-19-2009, 01:24 PM   #2
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Hmmm... maybe the sponge wasn't good enough. I always shop-vac, and then follow it up with a tack cloth.

To fix, scrape off the failing paint, vac, tack, then coat with Gardz (Gardz is a "troubleshooting" drywall sealer), Primer, and then paint.



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Old 04-19-2009, 01:42 PM   #3
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A lot of times you will get Pledge on the wall from a nightstand or something else close to the wall that got sprayed. Could also be any kind of grease or oil on the walls. Sometimes you don't see it and you need something more than just water to get it off the walls.
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Old 04-20-2009, 07:13 PM   #4
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Clean the surfafce again and use a oil base primer like the regular bins. If this room had wallpaper at one time or another it could be the resins from left over glue creating a problem. Latex primer will not surpress this issues it will actually aide in it. While an oil base sealer will surpress the glues if there are any.
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