How to Paint a Metal File Cabinet with Spray Paint

Painting a metal file cabinet can give an old piece of office furniture new life and allow it to match your home decor. With the right preparation and painting technique, you can easily transform the look of a metal file cabinet using spray paint. This comprehensive guide will walk you through all the steps and provide tips for successfully painting file cabinets made of metal.

Introduction

Painting metal file cabinets is an affordable way to update the look of your home office or workspace without having to buy new furniture. Spray paint allows you to easily change the color and refresh old, scratched, or dingy metal cabinets. With some simple preparation, high-quality spray paint, and careful technique, you can give a metal file cabinet a beautiful, professional-looking finish.

This article will cover everything you need to know to properly prep, prime, and spray paint a metal filing cabinet. We’ll go over cleaning, sanding, and masking techniques. We’ll also provide tips on selecting the right spray paint, recommend brands, explain proper spray painting technique, and give advice on avoiding common mistakes.

Follow the steps outlined here and you’ll be able to transform the look of a tired old metal cabinet into a like-new piece of furniture. The end result will be a file cabinet with a durable, smooth, professional-quality painted finish that matches your home’s color scheme.

Benefits of Painting Metal File Cabinets

Here are some of the benefits of taking on a DIY spray paint makeover for a metal file cabinet:

• Cost savings – Spray painting a cabinet is much more affordable than buying a new one. Cans of spray paint range from $3-$20 depending on brand and finish.
• Customization – You can choose any color paint you like to match your home’s decor.
• Quick update – Painting goes fast and transforms the look quickly. No need to spend hours stripping or sanding if the original finish is intact.
• Long-lasting finish – With proper prep and application, spray paint adheres well and will last for years.
• Eco-friendly – Painting recycles and extends the life of old furniture that would otherwise wind up in a landfill.

If you have an unattractive metal file cabinet that is structurally sound, painting it with spray paint is an excellent way to inexpensively update its appearance. The project can usually be completed over a weekend with results that look like new.

Step 1 – Clean the File Cabinet Thoroughly

The first step in how to paint a metal file cabinet with spray paint is to thoroughly clean all surfaces. Any dirt, dust, grease or grime will prevent proper paint adhesion and affect the quality of the finished product.

You’ll need:

• Dish soap
• Water
• Clean cloths or scrub pads

Make a cleaning solution by mixing a few drops of dish soap with warm water. Dampen your cloth or scrub pad in the solution and wipe down all surfaces, inside and out.

Pay special attention to grimy areas around handles or anywhere hands frequently come into contact with the cabinet. Use a toothbrush to scrub into small crevices if needed.

Rinse with a clean damp cloth and dry thoroughly with a lint-free rag. Your metal file cabinet needs to be completely free of any residue before moving onto sanding or applying primer.

Cleaning Tips

• Use the warmest water possible when cleaning metal as it is more effective at cutting through grease.
• Repeat cleaning if necessary until all traces of grime are gone.
• Dry immediately with a microfiber cloth to prevent rust or streaks.
• Wear rubber gloves to protect your hands from harsh detergents.

Thorough cleaning is a critical first step for ensuring your spray paint adheres properly and provides long-lasting protection.

Step 2 – Sand the Cabinet Lightly

Once your file cabinet is clean, the next step is to scuff sand the surface. This helps the spray paint grip onto the slick metal surface.

You’ll need:

• Sandpaper (120-220 grit)
• Sanding block (optional)
• Tack cloth
• Safety gear (mask, goggles, gloves)

Start with medium (120-150) grit sandpaper and lightly sand all areas to be painted. You only need to scuff up the surface a bit for the paint to adhere, not remove metal.

Use a sanding block for flat areas and sand by hand on contoured parts. Wipe with a tack cloth after sanding to remove all dust.

Be sure to sand inside drawers and cabinet doors as well. Sand any scratched areas a bit more thoroughly to help paint adhere in damaged spots.

Safety gear like a mask, goggles, and gloves are recommended to protect from inhaling metal dust. Work in a well-ventilated area.

Sanding Tips

• Always sand in the direction of the grain on metal.
• Use varying grit sandpaper on badly scratched spots to gradually smooth them.
• Replace sandpaper sheets once they become clogged for best results.
• Take your time sanding and check for missed spots where paint won’t stick.

Proper sanding prep helps the spray paint bond tightly so it lasts for many years without chipping or peeling.

Step 3 – Wipe Away Dust with Tack Cloth

After sanding, wipe all surfaces with a tack cloth. This picks up any fine metal dust left behind from sanding.

You’ll need:

• Tack cloth

Wipe the cabinet inside and out with the tack cloth. Get into crevices and corners. Any dust left on the metal will show through the new paint job.

Change to a clean portion of the tack cloth often to prevent spreading dust around. Gently rub all areas that will be painted.

The cabinet needs to be spotless before applying primer and paint for a blemish-free professional finish.

Tack Cloth Tips

• Use short, gentle motions when wiping to pick up dust rather than push it around.
• Tack cloths work best on a freshly sanded surface before dust accumulates.
• Avoid wiping too aggressively on delicate surfaces that could scratch or imprint the cloth pattern.
• Discard soiled tack cloths and use a fresh piece for best results.

Taking the time to properly tack off all the fine dust will lead to a smooth finish without imperfections.

Step 4 – Apply Primer to the File Cabinet

Once cleaned, sanded, and dusted, it’s time to apply primer. Priming ensures optimal spray paint adhesion and provides extra protection from rust.

You’ll need:

• Primer (self-etching)
• Paintbrush and/or paint roller
• Drop cloth
• Ventilated workspace (garage or outdoors)

Choose a high-quality self-etching primer formulated especially for metal. Rust-Oleum and Krylon both make excellent primers for metal furniture and cabinets.

Set up in a well-ventilated area and cover the floor with a drop cloth. Use a paintbrush to prime recessed areas and tight spots. Then use a small foam roller to quickly prime large flat sections.

Apply a thin, even coat of primer and work systematically from top to bottom. Follow the product directions for dry time before applying spray paint.

Priming Tips

• Always read and follow the primer product instructions carefully.
• Apply two coats of primer on heavily rusted areas for maximum protection.
• Tinting primer grey helps obtain full paint coverage on dark finishes.
• Dispose of paint-soaked supplies properly to avoid fire hazards.
• Allow for longer dry times when priming in areas with high humidity or low temperatures.

Primer creates the ideal surface for the spray paint to adhere to so don’t skip this important step.

Step 5 – Prepare Your Work Area for Spray Painting

Careful preparation of your workspace is crucial before starting the spray painting process. Here’s how to set up an optimal area:

• Work outdoors or in a well-ventilated area like a garage. This prevents inhaling paint fumes.
• Cover any nearby surfaces with drop cloths to protect from overspray.
• Remove cabinet doors, handles, and drawers for easier access.
• Tape off any areas you don’t want painted like glass panels or hardware.
• Have all paint supplies and tools readily available to work efficiently.
• Wear a respirator mask during the spray painting process.
• Try to paint when humidity is low and temperatures are between 50-90°F for proper drying.

Taking time to properly prep your painting area results in a more controlled spray environment and higher quality finish.

Step 6 – Select a High Quality Spray Paint Brand

Choosing the right spray paint for metal is crucial to achieving a flawless professional finish that will last. Here are top brands to consider:

Rust-Oleum

Rust-oleum is a leading brand when it comes to rust prevention and protection. Their spray paint formulas are ideal for metal surfaces. Look for their Universal line for all-purpose use or Hammered for a textured metallic look.

Krylon

Another top option, Krylon also makes high-performing spray paints designed to bond well on metal. Their Fusion All-In-One formula provides excellent coverage in one coat.

Montana Cans

Known for professional-grade paints, Montana Cans offer premium acrylic lacquers in a wide array of colors. Provides stunning results on metal furniture.

Valspar

Budget-friendly option that still offers quality and coverage. Their spray paint for metal provides 10x more rust protection.

No matter which brand you choose, select paint marketed specifically for metal or universal use. Avoid art-only spray paints.

Step 7 – Select a Sheen Level

Another factor when choosing spray paint for a file cabinet is the level of sheen or glossiness. Common sheen options include:

• Flat/Matte – Provides an ultra-smooth finish with no shine. Great for hiding imperfections.
• Satin – A soft glow without being overly shiny. Often used for furniture.
• Semi-Gloss – Medium-level luster. Resists yellowing and easier to clean.
• Gloss – Highly reflective shine. Can accent metal details nicely. Shows imperfections.

For most filing cabinets, satin offers the best of both worlds – a subtle sheen but not so shiny fingerprints and smudges show.

Consider the final location of the cabinet when picking a finish. Glossy paint would be ideal for a garage or workspace, while flat or satin works better in home offices and studies where you want a muted look.

Step 8 – Shake Spray Paint Well Before Use

After selecting the right spray paint product for your metal filing cabinet, the next key step is to properly mix the paint by shaking the can.

Follow these tips when shaking spray paint:

• Read instructions on can and shake for the recommended time, usually 1-2 minutes.
• Continue shaking occasionally during use to maintain consistency.
• Listen for the mixing ball moving freely inside the can.
• Shake aerosol cans before each use, not just the first time.
• Hold can firmly and shake it rapidly in a back-and-forth motion.
• Turn can upside down during shaking to fully mix pigment.

Shaking the spray paint thoroughly before and during the project prevents splattering, clogs, and uneven coverage results.

Step 9 – Mask Off Any Areas Not Being Painted

To prevent getting stray paint on nearby surfaces when spray painting, properly mask off anything you don’t want to risk painting:

• Fully remove and store any small hardware like handles or hinges.
• Use painter’s tape to mask off glass panels, metal trim, or any adjacent surfaces.
• Remove drawers and doors to spray separately. Use drop cloths underneath.
• For built-in cabinets, mask off surrounding walls, countertops, floors.
• Use paper or plastic and tape to completely seal off any areas at risk.
• Check edges of tape for full adhesion to prevent paint from bleeding under it.

Taking time to properly mask and cover nearby surfaces results in the cleanest edges and minimal touch ups.

Step 10 – Spray Paint in Slow, Even Strokes

You’re finally ready to start spray painting the cabinet! Follow these tips for best results:

• Hold can 6-10 inches from surface when spraying.
• Apply light coats using slow, even strokes. Multiple thin coats are better than one thick coat.
• Frequently shake paint can during project to prevent clogging.
• Keep spray can the same distance from surface.Overlap strokes about 30%.
• Work systematically and let each coat dry before adding another.
• Add 2-3 coats for full coverage, allowing proper dry time between coats.
• Spray paint edges and hard to reach spots first when fully assembled.
• Finish with final coat on outer surfaces when fully reassembled.

Proper spray paint technique prevents drips, runs, and brush marks for a flawless finish.

Step 11 – Allow Appropriate Dry Time Between Coats

Drying time is extremely important when spray painting metal filing cabinets. Rushing the process can ruin the finish.

• Check paint can for recommended dry times between coats. Usually 1-2 hours.
• Longer dry times may be needed for thicker coats or high humidity climates.
• Test paint by gently touching it before adding another coat. It shouldn’t be tacky or transfer.
• Working in shorter sessions allows paint to dry fully before continuing.
• Insufficient drying leads to issues like cracking, poor adhesion, and loss of gloss.
• Cold temperatures or poor ventilation lengthen required drying times.
• Use a portable heater or fans to speed drying if needed.

Have patience and allow each coat to cure adequately before continuing spraying for best long-term performance.

Step 12 – Spray Paint the Cabinet Doors Separately

File cabinet doors often benefit from being spray painted separately for the most professional results. Here’s how:

• Completely remove doors from the main cabinet. Also remove handles/knobs.
• Place doors on a protected surface for spray painting. Cardboard or plywood works well.
• Use painter’s tape to mask off edges along hinges or glass panels.
• Starting spraying doors using same technique as cabinet box. Apply multiple coats.
• Touch up paint around edges of door as needed after reattaching.
• Adjust door alignment if spray paint buildup affects closing properly.

Door painting tips:

• Mark doors to remember exactly where they were originally attached.
• prop doors open while drying to prevent sticking.
• Spray paint the cabinet box right after removing doors for best color match.

Carefully spray painting doors apart from the cabinet allows for more control and coverage.

Step 13 – Avoid Common Spray Painting Mistakes

When taking on a DIY spray paint project like a metal filing cabinet, it’s important to be aware of potential mistakes:

• Drips and Runs – Occur from applying paint too heavily. Hold can closer to surface.
• Blotchiness – Results from not shaking paint enough or spraying from too far away.
• Bubbling – Caused by painting over a surface that isn’t fully dried. Allow more drying time.
• Chipping – Often due to skipping primer or applying paint too thickly. Use thin coats.
• Brush Marks – Seen when paint is applied too slowly or not overlapped enough.
• Orange Peel Texture – Caused by applying paint in cold conditions or holding can too close.

Being mindful to spray paint slowly and methodically prevents many common flaws in the finish.

Step 14 – Remove Masking and Reinstall Hardware

Once your final coat of spray paint has dried completely, you’re ready for the finishing touches:

• Carefully remove all masking tape from the freshly painted metal filing cabinet.
• Check edges for any paint that bled under the tape and touch up as needed.
• Clean glass panels thoroughly to remove any paint overspray.
• Reattach cabinet hardware like handles, hinges, or drawer pulls.
• Place cabinet doors back on, adjusting alignment as needed.
• Return cabinet to its original location and enjoy your revamped file storage!

Taking the time to properly reassemble the painted file cabinet gives it a like-new finished appearance.

FAQs About Painting Metal File Cabinets

Still have some questions about transforming your ho hum metal filing cabinet with spray paint? Here are answers to some frequently asked questions:

Should I remove old paint before spraying a new finish?

• If the existing paint is in good shape, you generally don’t need to strip it to the bare metal before painting. Simply scuff sand glossy areas for the best adhesion.
• However, if there are areas of peeling, cracking, or flaking paint and rust present, you’ll need to thoroughly remove the paint until only bare metal remains before priming.

Can I spray paint over rust?

• No, any rust or corrosion needs to be removed before applying primer and paint. The rust will continue spreading under new paint if not properly treated first.
• Lightly sand rust spots, wipe clean, apply rust reformer primer like Krylon’s Rust Tough, and then topcoat.

How do I avoid brush marks when spray painting?

• Brush marks happen when spray painting sections too slowly or from too close. Maintain consistent distance and spray in quick smooth motions.
• Overlap strokes to blend sections together. Often caused by starting/stopping or changing directions abruptly.

What temperature is best for spray painting metal?

• Ideal conditions are between 50-90°F with low humidity. This prevents drips, runs, drying issues. Can paint in colder or warmer temps by taking extra precautions.

How soon can I use the file cabinet after painting?

• Allow spray paint to cure fully before use, usually 24-48 hours. Test that paint is hard and not tacky when gently touched.