DESCRIPTIONReddish-brown stains on the paint surface. POSSIBLE CAUSESSteel in contact with air and moisture will rust (e.g., nails, steel railings, damaged galvanized, flashing, etc.). SOLUTIONSPrime 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. |