Is there anything you can put over flat paint to help control a moisture issue? The interior paint is a flat and where a plastic picture/sign has been hanging there seems to be moisture getting trapped behind it and is causing mildew? Hoping to not have to re paint the walls.. Thanks
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It’s not really trapping moisture, it is blocking light and causing a local chemical change in the paint over a long time… washing your walls once in a while will prevent this, but now since you let it go so long, you’ll best have to repaint the whole wall…