Incompatibility causes - usually caused by painting over 3 or more layers of alkyd or oil based paint with a latex top coat. The old paint has become brittle and will lift off the surface. Inadequate surface preparation. Using a not recommended top coat.
Paint incompatibility solutions - remove all the loose paint by scraping or wire brush for masonry. Power washing is recommended for large areas. Feather sand edges for smooth appearance and rinse thoroughly with a hose. All bare areas will need spot priming.
Primers and exterior finishes - Priming is essential for better adhesion, sheen uniformity, mildew control and durability. Ask your Muralo dealer for the best Muralo exterior paint for your project, in the color and sheen of your choice.