Say goodbye to flash rust with Rustbuster Bor-X

The anti-flash rust solution every home restorer and workshop needs

If you’ve ever cleaned, blasted or rinsed steel, only to see that bright, clean surface turn orange within minutes, you’ve experienced flash rust. It’s a common problem when metal gets wet during surface preparation and then sits before coating or finishing.

There’s an easy way to stop it.

What is Bor-X anti-flash rust?

Rustbuster Bor-X is a water-soluble corrosion inhibitor designed to be added to water-based fluids and machining systems. It forms a short-term protective barrier on wet metal, helping prevent rapid surface corrosion while parts are being worked on, handled, or moved between process stages.

How it works

You add Bor-X to your rinse, wash or cleaning water at the appropriate rate (typically a low percentage). It bonds at the metal surface to reduce the oxygen and moisture interaction that causes flash rust. When you’re ready to prime, paint or coat, the metal remains cleaner and largely rust-free.

This makes it especially useful for DIY restorers, hobbyists and small workshops that want parts to stay in good condition after stripping or washing, without having to repeat preparation work.

Why it’s a great addition to your process

Bor-X is easy to mix into water-based fluids without specialist equipment. It helps keep parts rust-free during handling or short-term storage between steps, and it works particularly well on ferrous metals such as mild steel.

For home restorers, classic car builders and small fabricators, it supports cleaner finishes and better coating adhesion by reducing the need to re-prep surfaces after flash rust appears.

Tips for best results

Use the recommended mixing rate for your fluid volume and make sure surfaces are properly cleaned first, removing oils, salts and other contaminants. Apply it before painting or sealing, and consider testing on a small part first to confirm the ideal concentration for your application.

Final thoughts

Whether you’re restoring a classic car, preparing steel for a new paint finish, or running a small workshop, Rustbuster Bor-X takes the hassle out of flash rust. It helps you keep that clean metal finish for longer, saving time and reducing the frustration of doing the same prep work twice.