How to Restore Metal Outdoor Furniture - Outdoor Cabinets

Restoring metal outdoor furniture can breathe new life into old, worn pieces and save you money compared to buying new. With some cleaning, a bit of elbow grease, and a fresh coat of paint or finish, you can make tired metal patio sets, bistro sets, benches, and other items look like new again. This comprehensive guide will walk you through all the key steps for restoring metal outdoor furniture and bringing back its former glory.

Assess the overall condition

Before determining the best restoration methods, take stock of the current state of your metal outdoor furniture. Look for:

Rust – Surface rust can often be removed, but deep or pitted rust may mean the metal is too far gone. Tap on rusted areas with a screwdriver to test thickness.
Paint/finish wear – Check for faded paint, scratched or worn spots that expose the bare metal underneath. This will determine if you need to repaint or simply re-coat.
Structural damage – Inspect for loose or broken welds, missing or corroded hardware, bent metal, sagging frames, etc. Severe issues may require repairs.
Moving parts – Test swiveling, rocking, folding, rolling, or sliding components to ensure proper functionality. Lubricate sticky pieces.

If the main structures and frames seem intact overall, restoration is likely worthwhile. Have realistic expectations about flaws you may not be able to remedy fully.

Clean the furniture thoroughly

Thorough cleaning is crucial for proper adhesion of new paint or finish. It’s also needed to remove dirt and grime that can accelerate deterioration of the metal.

Supplies needed

Bucket of warm water mixed with a small amount of dish soap or other mild detergent
Scrub brushes with stiff and soft bristles
Old rags, sponges, microfiber cloths
Plastic scraper or putty knife
Garden hose
Tarp or drop cloth
Rubber gloves
Eye protection
Shop vacuum (optional)

Instructions

Remove any cushions, umbrellas, or removable décor pieces and set aside.
Lay down a tarp in your work area to protect the ground from splashes and spills.
Use the vacuum attachments to remove loose dirt and debris from crevices and carved details if possible.
Mix warm water and mild detergent in the bucket. Dampen your scrub brush, rags, and sponge in the solution.
Scrub all surfaces to lift dirt from the metal. Use stiff bristle brushes for textured areas and soft brushes for smooth flat spots.
Pay close attention to engraved or carved designs that collect grime in crevices.
For stubborn deposits, apply more solution and let it soak for 5-10 minutes before scrubbing.
Use the putty knife or plastic scraper to gently remove any peeling paint or thick gunk. Take care not to gouge or scratch the metal.
Rinse thoroughly with fresh water using sponges, rags or the hose. Change rinse water frequently to prevent redepositing grime.
Allow the furniture to dry completely before moving onto the next steps. Inspect closely and repeat cleaning if needed.

Fix dents, wobbles and other damage

Minor dents are common on metal outdoor sets after years of use and weathering. Wobbly chairs, broken welds or hardware can also occur over time. Address these issues prior to restoration for maximum integrity and longevity of the furniture.

Supplies needed

Hammer and block of wood
Fine grit sandpaper (400-600 grit range)
Metal file
JB Weld or similar metal epoxy
Super glue
Welder and welding supplies (for major weld repairs)
Replacement hardware (bolts, screws, nuts, washers)

Instructions

For dents – Place the dented area on a solid wood block. Dampen cloth and hold over dent to avoid scratches. Carefully tap with light hammer strokes to smooth and raise up the indented metal.
For stability issues – Inspect joinery and determine cause. Tighten hardware if loose. Use metal epoxy if bolts or screws are damaged. Sand and glue wobbly joints that won’t tighten properly.
For broken welds – Support and clamp the broken area. Use a file to clean rough edges. Re-weld with similar metal filler rod and a welder if possible. Grind smooth.
For missing hardware – Note locations of any missing or unsalvageable hardware like bolts, screws, caps or covers. Take measurements and purchase appropriate replacement pieces.

Being patient and methodical with dent removal and repairs will preserve the integrity of the original metal furniture frames. Touch up scratches or gouges afterwards before painting.

Remove rust properly

Surface rust can form on metal patio furniture when moisture sits on unfinished areas. More extensive rust can penetrate deeper when untreated. Match your rust removal method to the severity.

For light rust:

White vinegar
Crumpled aluminum foil
Fine grit sandpaper
Steel wool (high grades 000-0000)

Instructions:

First try sprinkling vinegar on rusted spots and rubbing with aluminum foil or very fine sandpaper. The acidity in vinegar dissolves light rust well.
For stubborn spots, use fine grade steel wool (000 or 0000) and rub gently to avoid scratching.
Wipe clean with a damp rag afterwards. Repeat if needed for total removal.

For heavy rust:

Paint/rust remover spray
Sandblaster
Angle grinder with wire wheel

Instructions:

Start by spraying problem areas with a commercial rust removal product. Allow it to soak as directed.
Use an angle grinder with a wire wheel attachment to buff off remaining heavy rust. Wear eye and hand protection.
As a last resort, take the furniture to professionals for sandblasting if you cannot remove all rust by other means.

Thorough rust removal is crucial to extend the lifespan and allow for attractive refinishing of patio furniture. Address heavy oxidation immediately to prevent worsening spread.

Sand away old paint and gloss

Sanding serves multiple important purposes in the restoration process. It removes any loose or flaking existing paint, eliminates gloss for better paint adhesion, and smooths rough areas.

Supplies

Electric orbital sander or sanding blocks/sponges
Assorted grit sandpaper – start with 80-100 grit, then 180, then 220.
Tack cloths
Drop cloths
Dust mask & eye protection

Instructions

Remove any cushions, fabric or accents so all metal is exposed. Cover the area below with drop cloths.
Use coarse 80-100 grit paper to strip away failing paint on all surfaces. Avoid removing paint that still has integrity.
Smooth and feather edges where old paint meets bare metal. Sand until uniformly dull.
Switch to finer 180 grit paper and smooth away sanding scratches, roughness and remaining gloss.
Finish by polishing with 220 grit paper to refine the surface for painting. Remove all residue.
Wipe thoroughly with tack cloths to remove sanding dust from cracks and crevices.
Clean and dry the furniture fully before applying primer and paint.

Take precautions against breathing paint dust by wearing a mask. Thorough sanding provides the clean, deglossed surface needed for maximum paint bonding.

Apply a protective primer

Quality primer helps the new paint adhere tightly and prevents bleed-through from corrosion or staining on the bare metal. Using primer is a must for a durable painted finish.

Supplies

Rust inhibiting primer spray can
Primer brush

Instructions

Choose a primer designed for metal that resists future rusting. Rustoleum and Krylon both offer good options.
Work in a well ventilated area and follow the primer can directions. Shake the can vigorously before starting.
Hold the can 6-10 inches from the surface and apply light, even coats of primer using a side to side sweeping motion.
Spray hard to reach spots. Use a small brush to prime detailed areas and edges.
Allow the recommended drying time between coats. 2-3 thin coats usually provides sufficient coverage.
Inspect closely for any missed spots and apply additional primer where bare metal shows through.
Once fully dry, the furniture is ready for applying topcoat paint.

Primer is the first line of defense against rust returning. Don’t skip this step in your outdoor furniture restoration process.

Repaint with suitable outdoor paint

Choosing the right type of topcoat paint ensures the restored furniture looks amazing while protecting from sun, moisture and daily use. Apply with care for professional quality results.

Supplies

Exterior grade acrylic paint
disposable paint trays, roller handles and covers
Angled trim paint brushes
Painters tape
Drop cloths

Instructions

Select acrylic exterior paint in your preferred colors. Semi-gloss provides pleasing shine.
For two tone sets, use painters tape to mask off sections before applying the second color.
Stir paint thoroughly before and during use to prevent uneven consistency.
Pour paint into trays. Load roller covers evenly and roll off excess on the tray edge.
Use angled brushes for cutting in edges and hard to reach spots. Roll larger flat areas for speed.
Apply paint smoothly and evenly, working in sections. Blend sections together while paint is still wet.
Allow proper drying time between coats as instructed on the can. Lightly sand and recoat if drips or unevenness occur.
Remove masking tape immediately once the final coat has fully dried.
Avoid placing cushions or using the furniture for several days to allow paint to cure fully.

Choosing quality exterior acrylic paint combined with proper application technique will provide lasting protection and vibrant color for many seasons of use.

Apply clear topcoat for extra protection

For optimal longevity, apply 1-2 coats of clear exterior grade polyurethane or varnish over the painted finish. This adds a protective barrier against sun damage, moisture, staining and scratches.

Supplies

Exterior polyurethane or varnish
Disposable paint tray set
Foam brushes
Lint free rags
Drop cloth

Instructions

Choose water based or oil based clear coat suitable for outdoor use. Water based is easier cleanup.
Work in a dust free area. Cover the floor with a drop cloth. Stir the topcoat thoroughly before and during application.
Use foam brushes to apply a thin, smooth layer, taking care not to leave drips or brush marks.
Allow 2-4 hours drying time then sand lightly with 220 grit paper to smooth any raised grain or imperfections.
Wipe away all dust with a lint free rag. Apply a second coat for maximum protection and shine.
Allow the topcoat to cure fully 72 hours before placing cushions or using the furniture.

Applying a protective clear coat is especially important for dining sets, bar height sets and frequently handled furniture to prevent premature wear and tear.

Maintain the renewed furniture

Once your metal patio furniture looks amazing again, proper maintenance is key to preserving your hard work for seasons to come. Here are some useful tips:

Check for cracks in paint/finish at the start of each season. Touch up as needed.
Wipe down regularly with mild soapy water to prevent dirt buildup. Rinse and dry completely.
Cover the set when not in use for extended periods to limit sun exposure and prevent pollen/debris accumulation.
Re-apply protective clearcoat every 1-2 years or whenever glossiness starts fading.
Lubricate and tighten moving parts that become loose as needed.
Repair signs of new dents, rust or damage quickly to prevent worsening.
Consider purchasing custom outdoor furniture covers for maximum protection when stored.
In winter, avoid shoveling heavy snow off furniture as the weight can damage frames.

By refinishing your metal patio sets properly and caring for them consistently, you can add 5-10 extra years or more to their lifespan. Your restored furniture will once again become a beautiful backyard asset.

Frequently Asked Questions

What type of paint should be used for outdoor metal furniture?

Exterior grade acrylic latex paints provide excellent adhesion and durability on metal furniture. Avoid enamel, indoors only or special finishes not meant for high usage and outdoor exposure.

Can I use Rustoleum to repaint patio furniture?

Yes, Rustoleum brand spray paints and finishes formulated specifically for outdoor use on metal surfaces perform very well for patio furniture restoration. Their primer, paints and clear topcoats offer good protection qualities.

How do you prep metal furniture for painting?

Proper prep is crucial for good paint adhesion. Remove all loose paint and rust fully, then sand to degloss and smooth the surface. Clean thoroughly before applying primer.

Should you sand before painting metal furniture?

Lightly sanding before painting is highly recommended. It removes gloss for better paint bonding, eliminates remnants of old flaking paint and smooths rough areas. Always sand before applying primer and paint.

What can I use if I don’t have an orbital sander?

You can still achieve good sanding results without powered tools. Sand by hand using fine grit sandpaper wrapped around a rubber sanding block or sponge for grip. Use a sanding sponge for contoured areas. Change paper frequently.

How do I fix rust spots on my patio furniture?

Light rust can often be removed with vinegar or very fine sandpaper. For heavy rust, spray on a rust remover product and use a wire brush on a drill or angle grinder to thoroughly strip the oxidation away.

Can I use a different color paint on metal patio furniture?

Absolutely! Stripping old paint and repainting with fresh new colors is a great way to update the look of your existing outdoor furniture sets without the cost of buying new.

How long does it take for spray paint to dry on outdoor furniture?

Drying times vary based on temperature/humidity. Most spray paints will be tack free in 1-2 hours but may take up to 24 hours to fully cure. Allow painted furniture to sit unused for several days to hardened completely.

Conclusion

Restoring worn but structurally sound metal patio furniture by stripping away rust and old paint and repainting with fresh protective finishes allows you to revive and use sets that still have good bones. With some work up front and ongoing preventative maintenance, your renewed furniture can once again become a beautiful, comfortable backyard asset for years before replacement is needed.