In industrial practice, “iron degreasers” are often acid- or solvent-based cleaners designed to remove grease or oil from metal—not necessarily sold under the Shield name.
Galvanized iron primers (e.g. Coral/Dulux Galvanised Primer) sometimes act as both cleaner and primer—recommended after degreasing and prior to topcoat. Local industrial suppliers sometimes stock galvanizing degreasers (acidic or alkaline) effective for surface preparation, although not Shield-branded
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