stain blocking
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Shellac-based primers fix stains and odors in 20 minutes, but use them in damp areas and they peel. See the right spots.
Philip Gauthier
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Multi-surface primers: pick the wrong one and stains bleed through. Use this 1-hour cheat sheet to avoid a costly repaint.
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Below are 11 oil-based primers that block stains without killing brain cells, but number seven revealed a dry-film secret that changes everything.
