Home Problems and solutions Formation of bubbles during application causes the appearance of cratering on the topcoat. Formation of bubbles during application causes the appearance of cratering on the topcoat. Exterior Wall Painting • Interior Wall Painting CausesNot using the right roller.Applying several coats without allowing the previous coat to dry.Applying paint on a very porous surface without priming.Excessive stirring of the paint before application. SolutionRemove the problematic surface.Apply a suitable product. TIP: For water-based ecological enamel paints, do not use foam rollers. TIP: Avoid intense stirring before application.
