How to Remove Rust from Metal Kitchen Cabinets
Rust on metal kitchen cabinets can be an unsightly problem, but with some effort, you can remove rust and restore your cabinets to their original beauty. Here are some helpful tips for removing rust from metal kitchen cabinets.
Assessing the Damage
Before you begin removing rust, inspect the cabinets closely to understand the extent of the problem. Look for areas where the paint has blistered, cracked or worn away completely, exposing the metal underneath. Flaking or bubbling paint often indicates rusting metal below the surface.
Determine if the rust has penetrated deep into the metal or if it is just surface rust. Deep rust will require more intensive removal methods.
Gathering Your Supplies
Removing rust requires using abrasives and chemicals to scrub the rust away and convert any remaining rust into an inert material. Here are the supplies you will need:
- Safety gear: gloves, eye protection, face mask
- Rust removal chemical: Naval jelly, phosphoric acid, or oxalic acid
- Abrasives: steel wool (grades 0000 or 000), sandpaper (80 to 120 grit)
- Cleaning supplies: scrub brushes, microfiber cloths, towels
- Primer, metal paint
Make sure to work in a well-ventilated area.
Removing Loose Paint and Rust
Start by removing any loose paint or rust using a plastic paint scraper or putty knife. Gently scrape off any paint or rust flakes that are not adhered. Take care not to gouge or scratch the metal.
Next, use 0000 or 000 grade steel wool to lightly scrub the surface to remove rust scale and lift paint edges. Apply pressure as needed, but avoid digging into good metal.
Vacuum up any loosened paint and rust particles.
Applying a Rust Removal Chemical
For deeper rust, apply a rust removal chemical like naval jelly, phosphoric acid or oxalic acid. These chemicals convert iron oxide (rust) into iron phosphate or iron oxalate to stop the rusting process.
Use a chemical specifically designed for rust removal. Follow all safety precautions when using chemicals and work in a well-ventilated area.
Use a scrub brush or steel wool dipped in the chemical to scrub affected areas. Let the chemical sit for 10-15 minutes before rinsing clean with water. Dry thoroughly with towels.
Repeat as needed for stubborn rust.
Sanding and Smoothing
After removing all loose paint and rust, smooth and level the surface using 80-120 grit sandpaper. Sand in the direction of the metal grain to avoid deep scratches.
Sand just enough to remove any remaining rust nodules and smooth the surface. Be careful not to over-sand good metal.
Wipe clean with a dry cloth when done.
Priming and Painting
Apply a high-quality metal primer to freshly sanded and cleaned cabinets. Primer formulated for metal will prevent rust from recurring.
Allow primer to dry fully before applying topcoats. Follow with at least two coats of durable satin, semi-gloss, or gloss paint specially formulated for metal.
Allow proper drying time between coats. Lightly sand between coats for best adhesion.
Preventing Future Rust
To help avoid rust recurring quickly, consider these tips:
- Maintain good ventilation behind cabinets to discourage condensation
- Keep cabinet surfaces dry by quickly wiping up spills
- Use rugs or mats to capture moisture under cabinet doors
- Avoid harsh cleaners that degrade paint over time
- Apply a fresh coat of protective paint every few years
With some work, you can restore the look of your metal kitchen cabinets and protect them from future rust damage. Be patient and take the proper steps to assess, prepare, treat and refinish the metal. Your cabinets will look freshly painted and rust-free.
Frequently Asked Questions About Removing Rust from Metal Kitchen Cabinets
How can I tell if my cabinets just have surface rust versus deeper rust?
Surface rust usually appears as orangey or reddish dust or flakes on the cabinet surface. It can often be wiped or scratched off. Deeper rust will look like bubbling, peeling paint and harder nodules or pits in the metal. Deep rust cannot be removed with light scrubbing.
What is the best rust remover chemical for cabinets?
Naval jelly, phosphoric acid and oxalic acid are common recommended chemicals for dissolving rust on kitchen cabinet surfaces. Ensure the product is marketed specifically for rust removal.
Can I just use sandpaper instead of chemicals to remove the rust?
For light surface rust, abrasives like sandpaper may suffice. But for deeper rust that has penetrated the metal, a chemical rust remover will be more effective and efficient. Chemicals convert the rust into an inert material so it does not return quickly.
How should I dispose of rust removal chemicals safely?
Follow the product instructions, as disposal methods may vary. Typically, you can dry out the sludge and scrape it into the garbage. Rinse containers with water and dispose according to local hazardous waste guidelines. Never pour chemicals down drains.
What kind of primer and paint should I use when refinishing cabinets after rust removal?
Use a high-quality primer specifically made for metal that will prevent rust. For topcoats, enamel, epoxy, and oil-based paints formulated for metal provide the most durable finish. Use satin, semi-gloss or gloss sheens.
How can I prevent rust from recurring quickly on my cabinets?
Proper prep and paint will help, but also maintain good ventilation behind cabinets, quickly dry spills, use rugs to collect moisture, avoid harsh cleaners, and reapply fresh paint every few years. Taking steps to reduce moisture exposure will slow rust formation.
Conclusion
Rusty metal kitchen cabinets can detract from your home’s decor, but with some elbow grease and the right products, you can remove rust successfully. Assess the rust extent, gather the needed supplies, thoroughly prep the surface, apply a rust removal chemical, smooth the metal with sanding, and refinish with proper primer and paint. With this process, you can eliminate rust and restore your cabinets to a like-new finish. Consistent care will also help prevent rapid rust recurrence.
