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Old 04-10-2019, 05:32 PM   #1
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Question Strange paint reaction. Anyone ever seen this?

I recently white boxed a small apartment - everything was sprayed. Product used: Coronado 5000 Super Kote - used it hundreds of times for this type of project. Upon leaving for the day I conducted my standard walkthrough and everything appeared to be in good order. When I return the next morning, I nearly sh*t myself when I saw that ONE specific wall looked like someone ran a hose along the top of it. I've seen plenty of strange contamination issues but NEVER this condition. Even brought the pics to my BM dealer and no one there had ever seen it either. Other painters at the store were completely dumbfounded as well. If you look at the wall running perpendicular to it (to the left of the problem wall) there's nothing wrong with it - nor were there problems anywhere else in the apartment. This problem stops exactly in the corners and exactly at the ceiling line. The brownish color underneath is the old paint color and its sheen is eggshell. The substrate is drywall. Walls were not washed head to toe but were examined for nastiness, spot cleaned, and dusted down.

To help move this in a more productive direction, rest assured that the following possibilities have been thoroughly discussed prior to coming here and have been ruled out. There's simply no way this problem would be so isolated if any of these were the problem. Remember, this happened on one specific wall and no where else. As for my own experience, I've been painting for 16 years.

1. Mil thickness
2. Ambient temp/humidity
3. Substrate temp
4. Sheen of old paint

Looking forward to your input.
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Old 04-10-2019, 09:54 PM   #2
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Judging by the window, I assume this is an exterior wall. Perhaps that exterior wall lacks a vapor barrier and the exterior atmospheric conditions overnight caused some moisture to migrate through the wall, inhibiting the drying of your paint and causing it to run.

I havenít seen anything this bad, but I have seen poorly insulated/vapor intrusion inhibited exterior walls do weird stuff. Especially if your in a basement.


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Old 04-10-2019, 09:58 PM   #3
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If it was me, I would probably try to remedy the issue by wiping any non dried paint off the wall. Painting it again early in the day, and use fans to make sure the coating is good and dry before possible external atmospheric changes could affect it.

If there is moisture coming through the wall regularity, you might get bubbles even then. But if the paint you use is relatively permeable, itíll probably be fine.


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Old 04-11-2019, 01:06 AM   #4
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Looks to me like someone ran a hose along the top of it.
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Old 04-11-2019, 04:31 AM   #5
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Quote:
Originally Posted by Mysticumbrella View Post
I recently white boxed a small apartment - everything was sprayed. Product used: Coronado 5000 Super Kote - used it hundreds of times for this type of project. Upon leaving for the day I conducted my standard walkthrough and everything appeared to be in good order. When I return the next morning, I nearly sh*t myself when I saw that ONE specific wall looked like someone ran a hose along the top of it. I've seen plenty of strange contamination issues but NEVER this condition. Even brought the pics to my BM dealer and no one there had ever seen it either. Other painters at the store were completely dumbfounded as well. If you look at the wall running perpendicular to it (to the left of the problem wall) there's nothing wrong with it - nor were there problems anywhere else in the apartment. This problem stops exactly in the corners and exactly at the ceiling line. The brownish color underneath is the old paint color and its sheen is eggshell. The substrate is drywall. Walls were not washed head to toe but were examined for nastiness, spot cleaned, and dusted down.

To help move this in a more productive direction, rest assured that the following possibilities have been thoroughly discussed prior to coming here and have been ruled out. There's simply no way this problem would be so isolated if any of these were the problem. Remember, this happened on one specific wall and no where else. As for my own experience, I've been painting for 16 years.

1. Mil thickness
2. Ambient temp/humidity
3. Substrate temp
4. Sheen of old paint

Looking forward to your input.
Mysticumbrella, that wall is definitely possessed.
Definitely call a priest/exorcist and tell him to bring a gallon of holy water.
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Old 04-11-2019, 04:43 AM   #6
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Just to be sure I would check if the wall on the left also has that brownish color underneath.
Maybe the possessed wall was painted as an accent wall with some strange paint and the new generation paint from Coronado is somehow reacting with it.
I assume that the Coronado 5000 Super Kote might be alcohol based paint and maybe the booze in it is reacting/activating the brownish paint (if my theory is correct that that was an accent wall painted with some weird paint).

Tho Jmayspaint might be spot on.
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Old 04-11-2019, 11:34 AM   #7
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Quote:
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looks to me like someone ran a hose along the top of it.

lol.
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Old 04-11-2019, 03:33 PM   #8
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is the substrate drywall? Or plaster? Or concrete?
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Old 04-11-2019, 05:21 PM   #9
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Quote:
Originally Posted by EveryDay View Post
Just to be sure I would check if the wall on the left also has that brownish color underneath.
Maybe the possessed wall was painted as an accent wall with some strange paint and the new generation paint from Coronado is somehow reacting with it.
I assume that the Coronado 5000 Super Kote might be alcohol based paint and maybe the booze in it is reacting/activating the brownish paint (if my theory is correct that that was an accent wall painted with some weird paint).

Tho Jmayspaint might be spot on.
Thanks for the input. The whole place was painted in that brownish paint. I tested several walls to confirm water based and this wall after it failed - also water based.
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Old 04-11-2019, 05:24 PM   #10
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Quote:
Originally Posted by Jmayspaint View Post
Judging by the window, I assume this is an exterior wall. Perhaps that exterior wall lacks a vapor barrier and the exterior atmospheric conditions overnight caused some moisture to migrate through the wall, inhibiting the drying of your paint and causing it to run.

I havenít seen anything this bad, but I have seen poorly insulated/vapor intrusion inhibited exterior walls do weird stuff. Especially if your in a basement.


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Sounds logical - and you're probably right. The way the wall looks, I can't imagine it's not moisture related. But just this wall? That's the crazy thing. I'm pretty much done messing with these older repaints because they're full of surprizes. Thanks for the input.
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Old 04-11-2019, 05:25 PM   #11
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It looked exactly like someone ran a hose along the top.

Last edited by Mysticumbrella; 04-11-2019 at 05:29 PM.. Reason: Better answer.
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Old 04-11-2019, 05:27 PM   #12
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is the substrate drywall? Or plaster? Or concrete?
It's drywall. I know this for certain because I had to perform several skin grafts to remove sags.
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Old 04-11-2019, 05:33 PM   #13
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Quote:
Originally Posted by Jmayspaint View Post
If it was me, I would probably try to remedy the issue by wiping any non dried paint off the wall. Painting it again early in the day, and use fans to make sure the coating is good and dry before possible external atmospheric changes could affect it.

If there is moisture coming through the wall regularity, you might get bubbles even then. But if the paint you use is relatively permeable, itíll probably be fine.


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Thanks, by the time I got to it the only wet paint left were the puddles on the floor from the running paint. After fixing all of the issues on the wall itself, I decided to prime with oil in case of some strange contamination factor. Repainted without incident.
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