What is the best paint for cast iron?
Oil-based paints are the most durable.
You’ll achieve a more uniform finish if you first apply an oil-based primer (e.g., Rust-Oleum Clean Metal Primer, $8.98 per quart on Amazon). However, you can apply oil paint directly to metal because it contains no water, and therefore there’s so no risk of rust.
Do you need special paint for cast iron?
Spray wrought iron with a primer made specifically for metals, such as True Value X-O. Rust rust-inhibiting primer. Aerosol primer and paint often provide the best, smoothest coverage results on metal, however; it may be necessary in some areas to apply metal primer with a paintbrush.
Do you need primer on cast iron?
Cast Iron radiators require painting to prevent rust from forming over time, traditionally this would be done using oil-based paints with high resistance to heat (at least 100°C) with appropriate, zinc-based rust inhibitor used as a primer and suitable oil-based undercoats.