Primer Colour: Grey Finish type: Semi-Gloss Rust Resistant Specific uses for product: Exterior Surface recommendation: Metal Outdoor use Davids Zinc 182 1 Litre Rust Primer - Grey ISOPON ZINC 182 is a highly effective rust inhibiting primer. Features Can be applied directly to metal once loose rust is removed Complete rust removal is recommended for best results Forms a tough, durable surface ideal for ting over Provides long-lasting, first-class rust protection