Step 1
1. Surface preparation: The surface must be dry, clean and free of chalking and contaminants before painting; good surfaces should comply with ISO 8504. 1.1 For uncoated steel, clean with power tools to St 2, free of rust pits (ISO 8501-1:2007); good surface preparation (blasting to Sa 2½) improves performance. 1.2 For primed steel, the primer and shop primer surfaces must be dry, clean and undamaged. 1.3 For coated surfaces, the existing paint system must be undamaged, clean and dry; for repairs, water-jet at WJ3 (NACE No. 5/SSPC-SP 12) or clean rusted areas with power tools to St 2
