Also known as ‘flashing’, poor sheen uniformity can be identified as shiny or dull spots on a painted surface that can lead to an uneven gloss.
Possible causes of flashing:
Uneven spread rate whilst painting
Failing to properly prime a porous surface
New substrates should always be primed and sealed before applying the top coat to ensure a uniformly porous surface. Without the use of a primer or sealer, it’s likely you’ll need an additional coat of paint to even out any sheen irregularities. Make sure you always apply paint from 'wet to dry' to prevent lapping.
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