DESCRIPTION

Reddish, brown (or sometimes black) stains appearing as blotches or streaks on surface or paint. See also Tannin Staining.

POSSIBLE CAUSE

• Steel in contact with air and moisture will rust (e.g., nails, steel railings, damaged galvanized, flashing, etc.).

• Steel nails may develop black discoloration when in contact with damp wood that possesses a high amount of tannic acid.

SOLUTION

See Lead Information.

• Prime bare steel as soon as possible with a rust-inhibiting primer or finish.

• Replace steel nails with galvanized or other non-rusting nails.

• Rusted nails that cannot be removed must be sanded to shiny metal; countersunk; coated with a rust-preventive primer; and then caulked, filled, or patched; and topcoated.

INTERIOR

PRIMER
(if needed)
All Surface Enamel Primer
DTM Primer/Finish
Pro Industrial™ ProCryl® Primer
or reapply the same coating

SUGGESTED FINISH
Emerald®
Duration Home®
Cashmere®
SuperPaint®
ProClassic®
All Surface Enamel

See Interior Paints

EXTERIOR

PRIMER
(if needed)
Exterior Oil-Based Wood Primer
All Surface Enamel Primer
DTM Primer/Finish
Pro Industrial™ ProCryl® Primer

SUGGESTED FINISH
Emerald®
Duration®
Resilience™
SuperPaint®
A-100®
WoodScapes®
or reapply the same coating

See Exterior Paints