Natural Rust Remover

Remove rust stains from sinks, tubs, and metal surfaces using natural acids. Safe and effective.

Prep Time 5 minutes
Yield 1 application
Difficulty Easy
Cost $0.50

Ingredients

  • 1/2 cup Lemon juice (Fresh or bottled)
  • 1/4 cup Salt (Table or kosher salt)
  • 2 tablespoons Cream of tartar (Optional, for extra power)
Safe for: porcelain, ceramic, stainless steel, chrome
Avoid on: marble, natural stone, brass, copper patina

Why This Recipe Works

The citric acid in lemon juice reacts with iron oxide (rust) and dissolves it. Salt provides abrasive action to help scrub away loosened rust. Cream of tartar is mildly acidic and adds extra rust-dissolving power. Together they lift even stubborn rust stains.

Instructions

  1. Make a paste: Mix lemon juice, salt, and cream of tartar (if using) to form a paste.

  2. Apply to rust: Spread the paste directly on the rust stain. Make sure it’s fully covered.

  3. Let it sit: Leave the paste on for 30 minutes to 2 hours, depending on severity.

  4. Scrub: Using a soft brush or cloth, scrub the area. The rust should lift away.

  5. Rinse: Rinse thoroughly with water.

  6. Repeat if needed: For stubborn stains, repeat the process.

Tips & Variations

  • For vertical surfaces: Make a thicker paste that will cling, or soak paper towels in the mixture and apply.
  • Mild rust: For light rust, just rub a lemon half dipped in salt directly on the stain.
  • Metal tools: Soak rusty tools in lemon juice overnight.
  • Prevent future rust: Dry metal surfaces thoroughly after cleaning to prevent new rust.

Safety Notes

  • Avoid on natural stone: Acids etch marble and limestone.
  • Test chrome first: Some chrome finishes may be affected by acids.
  • Don’t use on intentional patina: This will remove the patina from copper or bronze.
  • Rinse thoroughly: Acid residue can damage surfaces over time.

Storage

Make fresh each time for best results. Lemon juice loses potency when stored in paste form.