How to Get Rust Off Metal Filing Cabinets

Rust can be an aggravating problem on metal surfaces like filing cabinets. It not only looks unsightly but over time it can cause the metal to weaken and corrode. Rust needs to be removed properly so it doesn’t quickly return. With some time and effort, you can get those metal filing cabinets looking good as new again.

What Causes Rust on Metal Filing Cabinets?

Rust is caused by oxidation when iron or steel is exposed to moisture and oxygen. Filing cabinets are commonly made of steel, making them prone to rusting. There are a few common causes of rust on metal filing cabinets:

• Exposure to Moisture – Any moisture sitting on the metal allows rust to form. High humidity, leaks, condensation, and spills can all introduce moisture.
• Lack of Proper Maintenance – Filing cabinets need occasional upkeep to keep rust at bay. Infrequent cleaning allows rust time to develop.
• Scratches or Damage – Any scrapes, scratches or dents that expose fresh metal underneath make the steel vulnerable to rusting.
• Prolonged Wet Conditions – Wet conditions speed up rusting exponentially. Flooding or excessive moisture accelerates the oxidization process.

Rust tends to show up first on the outer edges, corners, and sides of filing cabinets. Areas exposed to wear like drawer handles and locks also rust readily. Keeping filing cabinets rust-free requires diligent maintenance and moisture control.

Gather the Right Rust Removal Supplies

Removing rust takes a little bit of work, but the right supplies make the process easier. Here are the recommended supplies to have on hand:

• Protective gear – Gloves, eye protection, and a mask/respirator protect you from debris and chemical fumes.
• Wire brush – A stiff wire brush scrubs off stubborn rust from metal surfaces.
• Sandpaper – Coarse grit sandpaper (60-100 grit) smooths rough edges after brushing.
• Rust removal solutions – Citric acid, naval jelly, CLR and other commercial rust removal liquids help dissolve hard rust.
• Scrub pads/sponges – For applying rust removal liquids and scouring.
• Clean cloths and towels – For wiping away rust residue after scrubbing. Avoid leaving lint behind.
• Painters tape – For covering areas you want to protect from drips/splatter.
• Drop cloth – For catching rust flakes and debris under filing cabinets.

Make sure you have all supplies on hand before tackling rust removal. Proper safety gear in particular helps avoid irritation from rust particles.

How to Remove Rust from Metal Filing Cabinets

With the right supplies gathered, you’re ready to start removing that troublesome filing cabinet rust. Here is a step-by-step process:

Step 1: Clear Surrounding Area and Cover Floors

Start by clearing objects away from the immediate work area so you have open space. Use painters tape to cover baseboards, walls, and other adjacent surfaces you want to protect from splatter.

Place a drop cloth underneath the filing cabinet to catch any drips and metal shavings. Have a vacuum ready to conveniently clean up debris as needed.

Step 2: Wipe Down the Filing Cabinet

Give the filing cabinet a thorough wipe down with a damp cloth to remove any dirt, grease, or grime on the surface. This helps any rust removal products soak in better.

Step 3: Lightly Scrub with a Wire Brush

Use a stiff wire brush to lightly scrub all rusted areas of the filing cabinet. Apply just enough pressure to lift the top layer of rust without severely scratching the underlying metal.

This initial brushing clears away loose, flaky rust. It also helps rust removal liquids penetrate better.

Step 4: Apply Rust Removal Solution

Spray or brush on a commercial rust removal product like naval jelly or CLR liberally over rusted spots. Let it soak for 5-10 minutes.

Citric acid mixed with water also works well for dissolving rust. Just mix 1 part acid with 3 parts water and scrub it on with a sponge.

Step 5: Scrub with Wire Brush Again

After letting the rust remover sit, go over the area again with the wire brush to scrub away the softened rust residue. Apply a bit of elbow grease to get down through oxidized layers.

Make sure to scrub in the direction of the grain to avoid unnecessary scratching on the filing cabinet finish. Wipe away any wet rust particles with a clean cloth.

Step 6: Smooth Edges with Sandpaper

Use coarse 60-100 grit sandpaper to smooth out any remaining rough patches or raised edges where rusting occurred. Gently sand just enough to even out the surface.

Sanding opens the pores of the metal in preparation for repainting if desired. Wipe off all sanding dust.

Step 7: Spot Treat Stubborn Rust

For any remaining specks of stubborn rust, reapply remover and let it soak longer. Use a scrub pad and plenty of pressure to scrub those spots away. Repeat sanding and remover application as needed.

Small trouble spots may need focused attention to fully clear away all rust residue. Persistence pays off.

Step 8: Wipe Down and Apply Rust Inhibitor

Once all rust has been removed, wipe down the filing cabinet again with a clean, dry cloth. Allow the metal to fully dry.

Optionally apply a rust inhibitive spray primer to help prevent future rust. Let dry completely. Now the metal is ready for repainting if desired.

Tips for Preventing Rust on Metal Filing Cabinets

Once you’ve put in the work to remove existing rust, you’ll want to keep it from coming back. Here are handy tips for preventing future rust on filing cabinets:

• Keep the filing cabinet dry and avoid excess moisture. Address any leaks promptly.
• Wipe up spills right away so liquid doesn’t sit on metal.
• Keep relative humidity below 50% in the room with a dehumidifier.
• Regularly dust filing cabinets to avoid damp dust buildup.
• Clean filing cabinets every few months with mild soap and water.
• Watch for dents, scratches or blemishes in the paint that could allow rust. Touch up as needed.
• Apply a layer of wax once or twice a year to protect the filing cabinet finish.
• Consider rust inhibiting paints/primers when repainting worn filing cabinets.
• Move furniture away from exterior walls where condensation gathers.
• Keep metal surfaces fully dry if planning to store filing cabinets or leave unused for a period of time.

With proper care and moisture control, it’s possible to keep metal filing cabinets rust-free for years. But in case rust does strike, now you’re armed with the knowledge to effectively remove it.

Frequently Asked Questions About Removing Rust from Metal Filing Cabinets

How long does it take to remove rust from filing cabinets?

It depends on the extent of rusting and type of remover used, but plan at least an hour. Mild surface rust can be brushed off in 30 minutes. For deep rust layers allow 2-3 hours for scrubbing, sanding, and drying time between steps. Severe rust buildup takes several sessions over a few days.

What is the fastest way to remove rust?

Using a commercial rust removal liquid helps dissolve rust much quicker than brushing alone. Naval jelly, CLR, phosphoric acid, or citric acid-based removers work in 5-10 minutes. Power tools like a wire wheel or rotary tool also speed rust removal but can damage the metal if not cautious.

What home remedy removes rust effectively?

White vinegar, lemon juice, Coke, and molasses all contain acids that will help dissolve rust over time. Simply soak a cloth and leave it on the rusted area for several hours before scrubbing. For a thicker paste, mix baking soda and lemon juice. Otherwise a commercial product works faster than DIY methods.

What is the safest rust remover?

Citric acid is naturally derived and non-toxic, making it very safe compared to harsh hydrochloric or phosphoric acids. Phosphoric acid isn’t extremely hazardous but should still be used with care. CLR and naval jelly are also relatively safe when precautions on the label are followed. Never mix different cleaners together.

How can you stop tools from rusting while removing rust?

It helps to have dedicated tools just for rust removal projects so they don’t start rusting themselves. Clean tools immediately after using to remove any lingering remover. Wipe down with WD-40 to displace moisture. Store wires brushes and tools properly to limit exposure to moisture when not in use.

Should you sand or wire brush first?

It’s generally best to do an initial gentle wire brushing first. That lift off the loose flaky rust for better penetration of the remover. Then after soaking in remover, do heavier scrubbing and sanding to get down to bare metal. The initial brushing also minimizes how much you’ll need to sand later.

Is it safe to remove rust when pregnant?

It’s best to avoid rust removal chemicals and coarse dust when pregnant. Have someone else handle applying harsh products like naval jelly. At minimum wear a tight fitting respirator mask, gloves, and work in a well-ventilated area to limit chemical exposure. Avoid power tools that generate lots of metal dust particles during pregnancy if possible.

How should rust remover be disposed of?

Check your local hazardous waste disposal guidelines. Rust removers with hydrochloric, phosphoric, or oxalic acid must be handled as hazardous waste. Neutralize acids before pouring diluted amounts down the drain. Store in original containers, rinse thoroughly and dispose at approved household hazardous waste facilities.

Can rust remover damage my skin?

Yes, rust removers can irritate skin and cause burns, especially hydrochloric and phosphoric acid-based ones. Always wear heavy duty gloves and long sleeves when using. Rinse any skin contact with remover right away. Keep products out of reach of children. CLR, vinegar, and citric acid are less dangerous but can still cause skin irritation with prolonged exposure.

When to Call a Professional for Rust Removal

While many DIY rust removal techniques are effective for filing cabinets, severely rusted metal may require a professional:

• If the rust has caused deep pitting and the metal integrity is compromised, replacement may be needed.
• Thick layers of rust that require power tools for removal should be left to professionals.
• Rust removal chemicals used incorrectly can damage surfaces or cause injury.
• Professionals have more advanced techniques like walnut shell blasting and can repaint professionally after rust is removed.
• If you don’t have proper safety gear or the space/setup for messy rust removal, hire help.
• Construction professionals can fix any moisture issues or leaks causing ongoing rust problems.

Don’t let rust damage on your filing cabinets get out of hand. At the first signs address it promptly and safely using the techniques above or call rust removal specialists if needed. With some perseverance, it’s possible to fully restore metal filing cabinets and prevent further rust damage.

Conclusion

Rusty filing cabinets detract from the aesthetics of an office space and also lead to weakness in the metal over time if left unchecked. Thankfully with the right supplies, protective gear, and thorough technique almost any level of rust can be removed and prevented from returning.

Keep the filing cabinet dry, use rust-inhibiting primer, practice careful cleaning and upkeep, and address any moisture issues or small rust spots right away. Taking action quickly when those first speckles appear will save the headache of dealing with major rust buildup later on.

With a little bit of persistence, it is very satisfying to see a filing cabinet transform from an eyesore of rust back into smooth clean metal again. Just allow proper drying time between steps, work safely, and be thorough for best results removing every trace of that troublesome filing cabinet rust.