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
or reapply the same coating

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®
or reapply the same coating

See Exterior Paints

CAULK
Stampede™ 1 Polyurethane Sealant
SherMax™ Urethanized Elastomeric Sealant
PowerHouse™ Siliconized Acrylic Latex Sealant