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Poor
Sheen Uniformity: Shiny spots or dull spots (also
known as "flashing") on a painted surface; uneven gloss.
Possible Causes:
Uneven spread rate.
Failure to properly prime a porous surface, or surface
with varying degrees of porosity.
Poor application resulting in lapping ( see Lapping )
Solution:
New substrates should be primed/sealed before applying the
top coat to ensure a uniformly porous surface. Without the
use of a primer or sealer, a second coat of paint will
more likely be needed. Make sure to apply paint from "wet
to dry" to prevent lapping. Often, applying an additional
coat will even out sheen irregularities.
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