- Scrape off loose paint and rust flakes.
- Shake the pen well.
- Press out some rust converter by pressing the pen's upper part a few times against a hard, clean surface.
- Apply liberally to the rusted area. Wipe away any residue outside of the rusted area with a lint-free cloth.
- The mended area will take on a blue-black colour after 15 minutes.
- Allow to dry for 3 hours before painting over.