How to Restore a Rusted Metal Surface Before Painting
Understanding Rust Development
Rust forms when steel reacts with oxygen and moisture. The longer rust remains untreated, the deeper it penetrates the metal surface.
Removing Loose Rust
Use wire brushes, power tools or abrasive blasting to remove all loose rust and scale. The cleaner the surface, the more effective the coating system will be.
Stabilising Remaining Rust
If rust cannot be fully removed, rust converters or specific epoxy primers can stabilise the surface and prevent further corrosion.
Cleaning and Degreasing
Thoroughly degrease the metal to eliminate oils and contaminants that can interfere with adhesion.
Rebuilding the Coating System
Apply a corrosion resistant primer followed by strong intermediate and topcoat layers. The thickness and product choice depend on the severity of the environment.