To paint a large section without leaving lap marks, roll the nearly dry roller in different directions along the dry edge, feathering out the paint as you go. After completing the entire length of the wall or ceiling, move to the next section and paint over the feathered edges. For the second coat, apply the paint in the opposite direction. This crisscrossing paint application sharply reduces (if not eliminates) lap marks.
The quality of materials used on your project will impact how it looks and how long it lasts. There is a huge difference in quality among coatings like paints and stains. There are also many specialized coatings that should be used for specific applications. Differences in the costs of a $9 gallon of paint versus a $50 gallon of paint represent real differences in the ingredients, with higher-priced paint having more expensive ingredients that look better and last longer, such as resins, binders and even titanium.
To paint a large section without leaving lap marks, roll the nearly dry roller in different directions along the dry edge, feathering out the paint as you go. After completing the entire length of the wall or ceiling, move to the next section and paint over the feathered edges. For the second coat, apply the paint in the opposite direction. This crisscrossing paint application sharply reduces (if not eliminates) lap marks.