Glidden Brush Ups: Lapping

What is Lapping?

Appearance of a denser color or increased gloss where wet and dry layers overlap during paint application.  May look something like this:



How do I fix it?

Using a top-quality latex paint makes it easier to avoid lapping problems because higher solids (pigments and binder) content makes lapped areas less noticeable. If substrate is very porous, it may need a primer/sealer to prevent paint from drying too quickly and reducing wet edge time. Alkyd interior paint colors generally have superior wet edge properties. Another helpful tip is to not paint in direct sunlight.