Mill test certificates specifying the coating material, coating weight, and application process are essential. Importers should also obtain a written product description from the manufacturer confirming the coating type does not fall under aluminum, zinc, tin, or other named coating categories. A binding ruling from CBP can provide certainty for recurring shipments.

Potentially yes. Antidumping and countervailing duty orders on coated steel products are often defined by specific coating types and processes. A product classified in the NES residual heading may still fall within the scope of an existing order if its physical characteristics match the order's product description, regardless of SITC classification. Scope rulings from the Department of Commerce can clarify applicability.