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Lapping:
Appearance of a denser color or increased gloss where wet
and dry layers overlap during paint application.
Possible Cause:
Failure to maintain a "wet edge" when painting.
Use of a low solids "economy" paint.
Solution:
Maintain a wet edge when painting by applying paint toward
the unpainted area and then back into the just-painted
surface. This technique (brushing or rolling from "wet to
dry," rather than vice versa) will produce a smooth,
uniform appearance. It is also wise to work in
manageable-size areas; plan for interruptions at a natural
break, such as a window, door or corner. Using a top
quality acrylic 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 paints generally have superior wet edge
properties. |
