While an angle grinder with a grinding disc or a wire wheel can remove loose rust and debris, they’re not ideal for thorough rust removal. Grinding discs can damage the good metal underneath, leaving noticeable gouges even after painting. Wire wheels, especially in an angle grinder, can be dangerous, catching on edges and throwing wire fragments. They also won’t always get down to clean metal. Sanding discs and Scotch-Brite discs are better for light rust, but they often leave behind rust-filled pits.
For truly effective rust removal, a sandblaster is the best investment. A sandblaster uses compressed air to propel abrasive media, like sand, at high velocity, effectively removing all rust from the surface. This ensures a clean surface for subsequent painting or restoration work. A smaller sandblast cabinet is ideal for tackling smaller parts. If you don’t own an air compressor, or yours is underpowered, a sandblaster provides a good reason to upgrade.
When sandblasting isn’t feasible, rust converters like POR15 or Eastwood’s rust encapsulators can be used. These products chemically convert rust and seal the surface to prevent further corrosion. However, meticulous application following the manufacturer’s instructions is crucial for long-term effectiveness, especially in areas exposed to water, mud, or salt. Remember, thorough surface preparation is key for successful rust treatment, regardless of the method.
