Remove blisters by scraping, sanding or pressure-washing down to underlying coats of paint or primer. Repaint the surface with a high-quality interior/exterior paint (make sure the surface temperature is below 90º f).
How to Fix Bubbles in Paint?
Bubbles in paint can be a pesky issue to deal with, but they don’t have to be the end of your project. With a little patience, some careful cleaning, and a few tips, you can fix bubbles in paint and get your project back on track.
First, it is important to determine the cause of the bubbles. If the bubbles were present when the paint was applied, then the problem is likely due to the paint or the way it was applied. If the bubbles formed after the paint dried, then the cause could be from too much humidity in the air or from a faulty paint job.
If the bubbles were present when the paint was applied, the most likely cause is that the paint was applied too thickly. This can be remedied by thinning the paint, either by adding a bit of water or by using a paint thinner. Be sure to stir the paint gently to avoid air bubbles.
If the bubbles formed after the paint has dried, the most likely causes are too much humidity in the air or a faulty paint job. If the air is too humid, you can try running a dehumidifier in the room
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