How to Refinish Metal File Cabinets

Refinishing metal file cabinets can give old office furniture a fresh, updated look. With some simple steps and supplies, you can transform dull and worn cabinets into attractive accent pieces for any room. Here is a comprehensive guide on how to refinish metal file cabinets.

Gather Your Supplies

Before starting the refinishing process, you will need to gather the following supplies:

• Sandpaper – Start with a coarse 80-150 grit to remove old paint/finish then move up to 220-320 grit for smoothing.
• Paint stripper – Used to remove old finish and paint from metal surfaces. Look for an environmentally-friendly option.
• Paint brushes and rollers – For applying primer, paint and sealers. Get a variety of brush sizes.
• Paint tray – To hold and distribute paint to your roller/brush. Disposable aluminum trays work great.
• Drop cloths – To protect floors and furnishings from drips and spills.
• Painters tape – For creating sharp edges and masking off areas.
• Chemical-resistant gloves – For handling paint stripper and protecting hands.
• Paint primer – Specially formulated to adhere metal surfaces. Rust inhibiting primers are a smart choice.
• Metal paint – Durable, oil-based enamel paints work best. Choose a sheen like semi-gloss.
• Sealant/topcoat – A clear polyurethane or enamel sealant will protect the finish.
• Rags, foam brushes, paint thinner, tack cloth, etc. – For cleaning, application and prep.

Remove Existing Finish

Before painting metal cabinets, you need to completely strip off the old finish. Here are the steps:

1. Remove the drawers and doors from the cabinet if possible. This allows you to fully access all surfaces.
2. Apply paint stripper liberally to all metal surfaces. Be sure to wear gloves and work in a ventilated area.
3. Let the stripper sit for the amount of time recommended on the product instructions. Reapply as needed.
4. Use a plastic scraper to peel away the softened paint and finish from the metal.
5. Scrub all surfaces with steel wool or abrasive pads to remove any remaining residue.
6. Clean the stripped metal thoroughly with mineral spirits then let dry.
7. Sand thoroughly using 80-150 grit sandpaper to scuff the surface for optimal paint adhesion.

Prepare and Prime the Cabinets

Proper prep and priming is crucial before painting metal. Follow these key steps:

• Clean all surfaces with a degreasing agent then rinse with water. Let dry fully.
• Fill any holes or dents with metal filler compound. Allow proper dry time then sand smooth.
• Sand all metal lightly with 220-320 grit sandpaper to smooth and prep for painting.
• Wipe away all dust with a tack cloth. Make sure the metal is perfectly clean.
• Apply a uniform coat of metal primer using a small foam roller. Allow to dry per the manufacturer’s instructions.
• Lightly sand the primer coat with 320-400 grit sandpaper to ensure a smooth surface.
• Clean away dust with a tack cloth and apply a second coat of primer for maximum coverage.

Painting the Cabinets

Follow these steps for flawless paint application:

• Use painter’s tape to mask off any areas you don’t want painted, like cabinet interiors.
• Shake or stir the paint thoroughly before starting. Periodically mix during use.
• Work in 2×2 foot sections for the most even coverage. Apply a uniform coat.
• Let the paint dry fully then do a light sanding with 320 grit sandpaper before applying a second coat.
• Allow the second coat to dry completely, then do one final sanding to ensure a smooth finish.
• Carefully remove the painter’s tape before the paint fully dries to prevent chipping.

Add a Protective Topcoat

A clear enamel or polyurethane topcoat will protect your paint job for years.

• Lightly sand the cured paint using extra-fine 400-600 grit sandpaper so the topcoat adheres properly.
• Wipe away all dust then apply a thin, even layer of the topcoat using a foam brush. Allow proper drying time.
• For the best durability, do a second topcoat. Gently sand between coats.
• Avoid over-brushing as it can create bubbles. Be patient and allow complete curing.
• Once fully cured, reattach doors, install hardware and put the drawers back in place.

And that’s it! With these steps, you can give metal file cabinets a stunning makeover. The updated finish will revive the look of any office, garage or workspace.

Frequently Asked Questions

Can I refinish cabinets without stripping them?

It is not recommended to paint over an existing finish. Paint and clear coats will not adhere correctly. Paint strippers fully remove the old finish for the best results.

What kind of paint should be used?

A durable enamel paint formulated specifically for metal is best. Oil-based provides a harder finish. Latex paints will not adhere well.

Do I need to sand between paint coats?

Light sanding between coats creates an optimal surface for the paint to stick to. It also smooths out any minor imperfections.

How do I avoid brush marks in the paint?

Use high-quality synthetic bristle brushes and maintain a “wet edge” as you paint. Avoid excessive brushing back over semi-dry paint.

Should cabinets be sealed for extra protection?

A polyurethane or clear enamel topcoat will seal and protect the finish from wear, scratches and fading over time.

Conclusion

Refinishing metal file cabinets is a satisfying DIY project that can give new life to old office furniture. With some basic skills and these step-by-step instructions, you can achieve professional-looking results. Painting provides a fresh facelift, while a protective topcoat ensures long-lasting durability. Give those worn cabinets a makeover and enjoy the renewed style they’ll bring to any workspace or room in your home.