Lapping: Occurs where wet and dry layers overlap during painting. Avoid with paint area management and technique.
Lapping probable causes: Wet and dry layers overlapping. Failure to maintain a wet edge during painting. Painting too large an area at one time. Unprimed porous surfaces. Painting when temperature is above 90ºF. Inadequate stirring and over thinning.
Lapping solutions: Another finish coat usually will hide lap marks. Proper priming will help avoid lapping on new work. Always paint from wet to dry and in small sections to keep a wet edge. Plan natural breaks like doors, windows and corners. Temperatures under 90ºF.
Primers & interior finishes: Priming is essential for better adhesion, sheen uniformity, mildew control and durability. Select a top quality interior paint in the color and sheen of your choice.