There are many reasons why your painted surface is blistering, chalking, flaking, or peeling. Find your problem listed below, and follow the steps it recommends to repair most flaws.
Alligatoring
This can happen by applying a second coat of paint before the first coat has dried.
For a mild case of alligatoring, sand and fill the area with a exterior spackling compound.
For a severe case, your only option will be to strip the paint.
Chalking
A powdery surface residue; Many exterior paints are meant to chalk; this allows
Rain to carry dirt away.
If it is down to the paint layer below, brush off the chalk, coat with a primer-sealer, and repaint.
Blistering
When blistering occurs soon after painting, it may be a result of hot, direct sunlight, which dries the paint's Surface, trapping solvents before they get a chance to evaporate.
After the paint is fully dry, scrape off the blisters, sand, and repaint early or late in the day.
Peeling
This is usually a result of painting over a greasy or dirty surface or moisture that is trapped beneath the paint.
Before painting, scrape and sand the surface. Correct any source of dampness. On masonry, peeling can have the same cause as crusting.
Crusting and Flaking
On a masonry wall, crusting and flaking can happen from a moisture-caused granular Buildup under the paint.
Clean the area with a wire brush and scraper. Wearing goggles and gloves, scrub with a mixture of one part muriatic acid.
and two parts water. Rinse well and let it dry. Correct the source of dampness, apply a masonry sealer, and then repaint.
Running and sagging are drip like formations that can occur when you apply paint too thickly.
To prevent runs and sagging, make sure to brush out and smooth each paint stroke.
