Reddish, brown (or sometimes black) stains appearing as blotches or streaks on surface or paint. See also Tannin Staining.
DESCRIPTION
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
- 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
See Interior Paints.
EXTERIOR
PRIMER
(if needed)
Exterior Oil Based Wood Primer
All Surface Enamel Primer
DTM Primer/Finish
SUGGESTED FINISH
Duration®
SuperPaint®
A-100®
WoodScapes®
CAULK
ProSelect® 1550A, 1230A, 1100A, or Window & Door
