T Surfaces and primers Unpainted softwood fnew or stripped

T Surfaces and primers Unpainted softwood composite boards Ordinary wood primers, all- purpose surface primers, or primer/undercoat Resinous softwood and hardwood Aluminium wood primer Insulation board Stabilizing primer New plastering, plasterboard, rendering, or brickwork All-surface primer under resin-based paints; no primer needed under emulsion Porous or powdery plaster, rendering, or masonry Stabilizing primer Old wallpaper Treat metallic inks with knotting New iron and steel Calcium plumbate primer outdoors; zinc chromate primate indoors Bitumen-coated metal Aluminium spirit-based sealer Galvanized iron and metal Calcium plumbate primer Aluminium Zinc chromate or zinc phosphate primer fnot lead- based primers) Copper and brass No priming necessary Lead Allow to weather before painting; no priming necessary Ceramic tiles All-surface primer or zinc chromate metal primer Plastic, glass fibre All-surface primer