How to Paint Rusty Metal Cabinets

Introduction

Painting rusty metal cabinets can completely transform the look of your kitchen or bathroom. Old, worn cabinets get a fresh new look with a coat of paint. However, painting over rust comes with some challenges that need to be addressed to achieve great results. Proper preparation is key when learning how to paint rusty metal cabinets.

In this comprehensive guide, we will walk you through all the steps needed to get your rusty cabinets ready for paint. We will cover cleaning, sanding, priming, painting techniques, top coat options, and maintenance. With some elbow grease and the right products, you can give your outdated cabinets a makeover. Follow our tips below to learn how to paint rusty metal cabinets and bring new life to your space.

Cleaning Rusty Cabinets Prior to Painting

Before painting, it is crucial to thoroughly clean the cabinets to remove grease, grime, and rust. Start by removing all doors, drawers, and hardware. Wipe down all surfaces with a degreasing cleaner. For heavily soiled areas, let the degreaser sit for 5-10 minutes before scrubbing and rinsing. Here are some degreasing cleaner options:

• Dish soap and water solution
• Trisodium phosphate (TSP) cleaner
• Degreasing chemical cleaner like Dirtex or Greased Lightning

Pay special attention to the cabinet frames around the edges and hinges which collect dirt. A toothbrush can help scrub tough grease spots. Rinse everything thoroughly after cleaning.

Next, tackle the rust spots. Use a wire brush attachment on a power drill to scrub off any loose rust flakes. Wipe down with a cloth dampened with mineral spirits to dissolve remaining rust residue. Rust converter products can also be used to chemically convert rust into an inert protective coating. Let cabinets dry completely before sanding.

Thorough cleaning and degreasing are vital preparatory steps for successfully painting over rust. Always work in a well-ventilated area when using chemical cleaners.

Sanding Down Rusty Cabinets

Sanding serves two important purposes when refinishing metal cabinets. First, it scuffs up the surface to help paint adhere properly. Second, it smoothens any remaining rust spots or ridges.

Use 120-150 grit sandpaper to sand all cabinet surfaces. Pay special attention to rust-prone areas around hinges and edges. Smooth any nicks, scratches or pits with automotive body filler before sanding, if needed. Wipe cabinets with a tack cloth after sanding to remove all dust.

Sand gently and avoid removing too much of the original finish. Keep the sandpaper moving constantly to prevent uneven scratches. Don’t forget to sand inside drawers and the cabinet box interiors too.

Sanding metal surfaces takes some elbow grease but it is an essential step. A smooth, even surface allows the primer and paint to adhere evenly for a seamless finish.

Priming Rusty Cabinets Before Painting

Primer creates a uniform surface for the paint to stick to. It also blocks stains, seals surfaces, and prevents future rust formation. Using the right primer is critical for painting over rusty metal cabinets. Here are some good primer options:

• Rust-inhibiting primers that contain rust neutralizers and converters, like Rust-Oleum Rusty Metal Primer.
• Self-etching primers that have strong adhesion on slick surfaces, like Krylon Metal Primer or Rust-Oleum Stops Rust Primer.
• Epoxy primers that provide maximum corrosion resistance, such as Sherwin-Williams DTM Wash Primer or POR-15 Rust Preventive Paint.

Some all-in-one paint + primer products can be used directly on metal too. But a dedicated primer is best for preventing future rust. Apply two coats of primer allowing proper drying time between coats. Use fine grit sandpaper to smooth the primer once dry.

Priming is the secret weapon against future rust. It covers existing rust spots, neutralizes any remnants and stops new rust in its tracks. Don’t skip this step when painting metal cabinets prone to rusting.

Painting Techniques for Rusty Metal Cabinets

Once properly primed, the cabinets are ready for the color paint of your choice. Oil-based or latex cabinet enamels work well for high-traffic kitchens. Semi-gloss or high gloss sheens have good durability. Here are some tips for achieving a smooth painted finish:

1. Use a High-Quality Brush or Roller

Invest in a good Purdy or Wooster brand angled sash brush and microfiber roller cover. The smooth application minimizes brush strokes.

2. Apply Thin Coats

Thin, even coats look more professional than one thick coat. Allow proper drying time between coats.

3. Maintain a Wet Edge

Work in small sections and maintain a wet edge as you go to prevent lap marks and visible roller marks.

4. Sand Lightly Between Coats

Gently sand with 220 grit sandpaper to remove any drips or dust specks. Wipe clean before re-coating.

5. Use Painter’s Tape

For a crisp paint line, tape off adjacent surfaces with quality painter’s tape. Remove while the final coat is still wet to prevent chipping the surface underneath.

Patience is key for an even factory-like finish when painting cabinets. Multiple thin coats with light sanding between each is ideal. Proper brushwork also prevents obvious roller marks. Take your time painting for a smooth, durable finish.

Top Coat Options for Painted Cabinets

For added protection on frequently used cabinets, apply a clear top coat over the cured paint:

• Polyurethane: Water-based or oil-based polyurethane adds a clear, durable and water-resistant layer. Ideal for cabinets in high-moisture areas.
• Water-Based Acrylic: Protects the paint without yellowing over time. Allows the paint to flex as wood expands and contracts.
• Wax Polish: Provides minimal protection but leaves a beautiful luster. Best for lightly used areas.

Apply thin coats following manufacturer directions, sanding lightly between coats. A top coat minimizes paint chips and makes cleaning easier.

Maintenance Tips for Painted Metal Cabinets

Paint refreshes old cabinets but requires some maintenance to stay looking fresh over time. Here are some tips:

• Wipe down painted cabinets periodically with a mild cleaner and soft cloth. Avoid abrasive cleaners.
• Hand wash painted cabinets gently. Never use harsh scrub brushes.
• Dry immediately after washing to prevent moisture damage.
• Re-apply protective top coats per manufacturer instructions.
• Watch for chips and re-touch paint as needed. Catching it early prevents major damage.
• If rust recurs, sand and re-prime those spots immediately before repainting.

With proper prep and application, painted metal cabinets will look amazing for years. But some occasional TLC is required to maintain the finish and prevent new rust.

Frequently Asked Questions

How long does it take to paint kitchen cabinets?

Plan on painting cabinets over 2-5 days:

• Day 1: Clean & Sand
• Day 2: Prime Coats
• Day 3: Light Sanding & First Paint Coat
• Day 4: Second Paint Coat
• Day 5: Final Coat & Reinstall Hardware

What mistakes ruin a cabinet paint job?

Common mistakes that can ruin cabinet paint jobs include: insufficient cleaning/prep, skipping primer, applying paint too thick, poor quality brushes causing streaks, not sanding between coats, and insufficient drying time between coats. Taking time to prep properly prevents many mistakes.

Can I spray paint metal cabinets?

Yes, you can spray paint metal cabinets for a smooth factory-like finish using an HVLP spray system. Ensure proper ventilation, mask off other surfaces, apply thin coats, and allow proper drying time between coats. Back-rolling after spraying reduces drips. Priming is still essential prior to spray painting.

Should I paint cabinet interiors?

The cabinet interiors or “boxes” don’t need glossy enamels. An interior latex paint works well for standard cabinets. Moisture-prone areas like near sinks may still benefit from oil-based enamel or marine paint for maximum rust prevention inside.

What sheen is best for cabinet paint?

Semi-gloss and high gloss sheens are best for cabinets. They are durable, stain-resistant and easily washable. Eggshell is too delicate a sheen for high traffic kitchens. Matte or flat finishes show every mark and are hardest to clean.

Conclusion

Learning how to paint rusty metal cabinets can give old, deteriorating cabinets new life. With some prep work, the right primer and paint, and careful application techniques, you can achieve a smooth factory-like finish. Always thoroughly clean cabinets first and scuff up the surface before priming and painting. Investing the time in proper prep work prevents paint failures down the road.Refreshing worn, rusty cabinets with paint is very rewarding. In just a long weekend, you can have a kitchen with beautiful, recovered cabinets at a fraction of the cost of a full remodel.