Labels such as high zinc or marine grade are not complete specifications. The project documents should define the required system and verification method.
Describe the real exposure
State indoor or outdoor use, moisture, salts, immersion, abrasion, temperature and expected maintenance access.
Reference the governing project documents
Identify the approved material, coating layers, colour, sampling and test method instead of relying on marketing terms.
Plan protection and repair
Agree packaging separation, handling limits, treatment of cut edges and the record required for field repairs.