Hammerite Red Oxide Primer A high performance anticorrosive formulation. Quick drying. Can be used inside or outside. Use on gates, railings & metal drainpipes. Available in: 250ml 500ml Hammerite Red Oxide Primer is specially formulated for use on both bare & rusty iron & steel. For aluminium, galvanised & all other non-ferrous metals, use Hammerite Special Metals Primer.