Outdoor Furniture Cleaning: Wood, Metal, Wicker, and Plastic

Quick Answer

Clean outdoor furniture according to material: wood (teak, cedar) needs mild soap and soft brush—never pressure wash; metal (aluminum, wrought iron) handles 1500 PSI with 25-degree nozzle; wicker requires gentle hand cleaning—no pressure washer; plastic/resin furniture tolerates up to 2000 PSI. Always test cleaning method on hidden spot first.

Key Takeaways

• Match cleaner to material - Wrong chemical damages furniture permanently
• Wood hates pressure washers - Hand clean only with mild soap
• Metal needs oxidation removal - Specialized cleaners for rust and corrosion
• Wicker is fragile - Hand wash gently, never use pressure washer
• Plastic loves pressure - Easiest to clean, tolerates highest pressure

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Material Matters: Identify Your Furniture

Outdoor furniture comes in four main categories, each with completely different cleaning requirements. Using the wrong method or chemical causes permanent damage.

Wood: Teak, cedar, pine, eucalyptus. Natural, durable, but sensitive. Pressure washing destroys wood fibers. Requires specific cleaners and oils.

Metal: Aluminum (most common), wrought iron, steel. Durable but oxidizes and rusts. Handles pressure washing well but needs proper cleaning agents.

Wicker: Natural rattan/reed (rare now) or resin wicker (common). Both fragile. Never pressure wash. Hand clean only.

Plastic/Resin: Polyethylene, poly lumber, recycled plastic. Most durable and easiest to clean. Handles pressure washing with no issues.

CRITICAL: Identify material before cleaning. Look for manufacturer labels, check underside of furniture, or search brand/model online. When uncertain, start with gentlest method (hand cleaning with mild soap) and progress only if needed.

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Wood Furniture: Teak, Cedar, Pine

Why Wood Fails

Pressure washing destroys wood furniture. High pressure lifts wood fibers, creates a fuzzy surface, and shortens lifespan dramatically. Beautiful teak sets can be destroyed in one cleaning with a pressure washer—never pressure wash wood furniture.

Wood also cracks from excessive moisture. Soaking wood with pressure washer causes swelling, then cracking as it dries. Once cracked, water gets deeper, causing more cracking and eventually rot.

Cleaning Process

Equipment: Soft bristle brush, bucket, mild soap, garden hose or low-pressure sprayer.

Cleaner: Mild dish soap (Dawn) or dedicated wood furniture cleaner. No bleach, no harsh detergents, no pressure washer.

Steps:

1. Remove loose debris: Brush off leaves, dirt, cobwebs with dry brush.
2. Pre-rinse: Spray with garden hose to wet surface. Don't soak—just dampen.
3. Apply cleaner: Mix dish soap with warm water (1 tablespoon per gallon). Apply with sprayer or brush.
4. Scrub gently: Work in circular motion with soft brush. Don't scrub hard—let soap do work.
5. Rinse thoroughly: Spray with garden hose until water runs clear. Remove all soap residue.
6. Let dry completely: 24-48 hours. Sun and wind speed drying.
7. Apply oil (optional): Teak benefits from teak oil. Cedar benefits from cedar oil. Other woods can use linseed oil or furniture oil. Reapply annually.

Specific Wood Types

Teak: Dense, oily, naturally weather-resistant. Develops silver-gray patina if untreated. Some prefer this look. If you want golden color, apply teak oil 2-3 times per year. Clean annually with mild soap.

Cedar: Naturally resistant to rot and insects. Weathers to gray. If you prefer red color, apply cedar oil annually. Clean with mild soap and water—no harsh chemicals.

Pine/eucalyptus: Less durable than teak/cedar. Requires more maintenance. Clean with mild soap, apply water sealer annually. Cover or store in winter to extend life.

Never Do This to Wood

• Pressure wash (even low pressure damages wood fibers)
• Use bleach (damages lignin, causes graying)
• Use wire brush (scratches wood, creates rough surface that grabs dirt)
• Soak excessively (causes cracking)
• Use abrasive cleaners (permanent scratches)

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Metal Furniture: Aluminum, Wrought Iron, Steel

Why Metal Needs Special Care

Metal oxidizes. Aluminum develops white powder oxidation. Wrought iron and steel rust. Both need specialized cleaners to remove oxidation and protect metal.

Cleaning Process

Equipment: Pressure washer (1500 PSI max) or garden hose, stiff bristle brush, metal cleaner, metal polish (optional).

Cleaner: Dedicated metal furniture cleaner or automotive metal polish. For mild oxidation, mild dish soap works. For heavy oxidation, specialized metal cleaner required.

Pressure washing: Aluminum handles 1500 PSI with 25-degree nozzle. Wrought iron and steel can handle 2000 PSI if not rusted through.

Steps:

1. Remove loose debris: Brush off dirt, leaves.
2. Apply cleaner: Metal cleaner or dish soap solution. Let dwell 10-15 minutes.
3. Scrub: Use stiff brush for oxidation and grime. Scrub in circular motion.
4. Pressure wash or rinse: 1500-2000 PSI with 25-degree nozzle. Or rinse thoroughly with garden hose.
5. Dry completely: Water spots metal. Dry with towels or let air dry in sun.
6. Apply protectant: Automotive wax or metal polish creates protective barrier. Reapply annually or when water stops beading.

Specific Metal Types

Aluminum: Most common metal furniture. Develops white oxidation but doesn’t rust. Clean with mild soap or aluminum cleaner. Apply automotive wax for protection. Touch up scratches with matching paint if desired.

Wrought iron: Heavy, durable, but rusts if protective coating fails. Remove rust with wire brush or sandpaper, apply rust converter, touch up with outdoor metal paint. Clean regularly to prevent rust buildup.

Steel: Similar to wrought iron but less common. Rust-prone. Same cleaning and maintenance as wrought iron.

Rust Treatment

Light rust: Wire brush or sandpaper removes surface rust. Clean thoroughly, apply automotive wax or clear coat.

Heavy rust: Use rust remover (contains phosphoric acid), scrub with wire brush, rinse thoroughly, let dry, apply rust converter or paint.

Rust through: Holes in metal mean structural compromise. Consider replacement rather than repair.

Never Do This to Metal

• Use abrasive pads (create scratches that rust faster)
• Use bleach (corrodes metal)
• Leave wet (rust develops quickly)
• Ignore rust spots (small spots become big problems)
• Use wire brush on aluminum (scratches protective coating)

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Wicker Furniture: Natural and Resin

Why Wicker is Tricky

Wicker has lots of nooks and crannies that trap dirt and moisture. Natural wicker rots if kept wet. Resin wicker is more durable but can still be damaged by harsh treatment. Both types hate pressure washers.

Cleaning Process

Equipment: Soft brush, vacuum with brush attachment, bucket, mild cleaner, garden hose (gentle spray).

Cleaner: Mild dish soap for regular cleaning. For mildew, add oxygen bleach (Oxiclean) to water.

Pressure washing: NEVER pressure wash wicker. Hand wash only.

Steps:

1. Remove loose debris: Vacuum thoroughly with brush attachment. Get into all crevices.
2. Pre-rinse: Spray gently with garden hose. Don't soak—just dampen.
3. Apply cleaner: Mix dish soap with warm water (1 tablespoon per gallon). Add oxygen bleach if mildew present. Apply with spray bottle.
4. Scrub gently: Use soft brush, work gently into crevices. Don't scrub hard—wicker breaks.
5. Rinse gently: Spray with garden hose to remove cleaner. Don't blast.
6. Dry thoroughly: 24-48 hours. Air circulation is critical—use fan if indoors.
7. Protect: Apply fabric protector spray to resin wicker (reduces staining). Natural wicker benefits from furniture oil occasionally.

Natural vs. Resin Wicker

Natural wicker (rattan, reed): Fragile, can’t get too wet. Clean with barely damp cloth, not soaking wet. Dry quickly—mold develops if wet too long. Best used under cover, brought indoors during rain.

Resin wicker (polyethylene): More durable, handles moisture better. Can be cleaned more thoroughly. Still hand wash only—no pressure washer. Apply fabric protector spray to reduce staining.

Mold and Mildew

Wicker is prone to mold in humid conditions. Remove mold with oxygen bleach solution (Oxiclean + water). Apply, let dwell 20-30 minutes, scrub gently, rinse thoroughly, dry completely. Improve ventilation to prevent recurrence.

Never Do This to Wicker

• Pressure wash (tears and breaks wicker)
• Soak natural wicker (causes rot and mold)
• Use wire brush (tears fibers)
• Leave wet (mold develops quickly)
• Use abrasive cleaners (scratches resin wicker)

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Plastic and Resin Furniture

Why Plastic is Easiest

Polyethylene and resin furniture is virtually indestructible. Handles pressure washing, harsh cleaners, sunlight, and neglect. Most forgiving outdoor furniture material.

Cleaning Process

Equipment: Pressure washer (up to 2000 PSI) or garden hose, stiff brush, general cleaner.

Cleaner: Almost anything works—dish soap, all-purpose cleaner, deck cleaner, even bleach (diluted) for tough stains.

Pressure washing: Handles up to 2000 PSI with 25-degree nozzle. 40-degree nozzle (white) is safest.

Steps:

1. Remove loose debris: Brush off dirt, leaves.
2. Apply cleaner: Dish soap or all-purpose cleaner. Let dwell 10-15 minutes.
3. Scrub if needed: For tough stains, scrub with stiff brush.
4. Pressure wash or rinse: Up to 2000 PSI is fine. Or rinse with garden hose.
5. Dry: Air dry or towel dry (prevents water spots).
6. Protect (optional): Automotive wax creates slick surface that resists staining. Reapply annually.

Tough Stains

Mold and mildew: Oxygen bleach (Oxiclean) or diluted bleach (1:1 with water). Let dwell 20 minutes, scrub, rinse.

Tree sap and pitch: Rubbing alcohol or mineral spirits removes sap. Apply with cloth, rub gently, rinse.

Rust stains: Rust remover (contains oxalic acid). Apply, let dwell 15 minutes, scrub, rinse thoroughly.

Food stains: Degreaser or heavy-duty cleaner. Scrub, rinse.

Color Fading

Plastic furniture fades from UV exposure. Can’t restore color completely, but:

• Paint: Use plastic-specific spray paint (Krylon Fusion for Plastic). Clean thoroughly, sand lightly, apply 2-3 thin coats.
• UV protectant: Products like 303 Aerospace Protectant reduce future fading. Apply monthly during season.

Never Do This to Plastic

• Use wire brush (creates scratches that grab dirt)
• Use abrasive cleaners (unnecessary—plastic cleans easily)
• Leave in direct sun year-round (causes fading and brittleness)—cover or store in winter

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General Maintenance Tips

Cover or Store in Winter

All outdoor furniture lasts longer if protected from winter weather. Covers work, but indoor storage is better. Freezing temps, ice, snow shorten furniture life significantly.

Tighten Hardware Annually

Bolts and screws loosen from use and temperature changes. Tighten all hardware annually. Replace rusted hardware with stainless steel.

Replace Cushions Properly

Cushions trap moisture against furniture, causing mold and rot. Remove cushions when not in use, or store indoors. If cushions get wet, dry thoroughly before replacing.

Inspect for Damage

Check for cracks, loose joints, rust spots, fraying wicker. Repair small problems before they become big ones. Wood glue, replacement hardware, touch-up paint go a long way.

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Pro Tips

• Clean furniture before deck. Dirty furniture drips on clean deck. Clean furniture first, then clean deck.
• Test cleaner first. Apply small amount to hidden area, let dry, check for damage. Wrong cleaner can strip finish off teak—test spot prevents expensive mistakes.
• Work in shade. Direct sun dries cleaners too fast, causing streaking. Early morning or overcast day ideal.
• Let wood dry completely before oiling. 48-72 hours minimum. Oil traps moisture if applied to damp wood, causing cracking and mold.
• Use furniture covers. Quality covers extend furniture life dramatically. Remove after rain or they trap moisture.
• Replace cushions annually. Cushions wear out, flatten, lose support. New cushions make old furniture feel new again.
• Invest in quality furniture. Cheap furniture costs more long-term—replaces every 2-3 years. Quality furniture lasts 10-20 years with proper care.

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Common Mistakes

Pressure Washing Wood

Destroys wood fibers, creates fuzzy surface, shortens lifespan. Hand wash wood only.

Using Bleach on Wood

Damages lignin (wood’s natural glue), causes graying and weakness. Use mild soap or dedicated wood cleaner.

Pressure Washing Wicker

Tears and breaks wicker strands. Hand wash only with soft brush.

Leaving Furniture Wet

Mold, rot, rust develop quickly. Dry thoroughly before storing or covering.

Ignoring Rust on Metal

Small rust spots become big problems quickly. Treat rust when first appears.

Using Wrong Cleaner

Harsh chemicals damage furniture. Match cleaner to material. Test first.

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People Also Ask

Can you pressure wash outdoor furniture?

Depends on material. Plastic/resin: yes, up to 2000 PSI. Metal: yes, 1500-2000 PSI. Wood: no, hand wash only. Wicker: no, hand wash only. Identify material before cleaning.

How do you clean teak furniture?

Hand wash with mild dish soap and soft brush. Rinse with garden hose, let dry 48 hours, apply teak oil if desired. Never pressure wash or use bleach. Clean annually, oil 2-3 times per year.

How do you remove mildew from outdoor furniture?

Oxygen bleach (Oxiclean) solution. Mix with water, apply, let dwell 20-30 minutes, scrub gently, rinse thoroughly. Improve ventilation to prevent recurrence. For severe mildew, use dedicated mold remover.

Can you use bleach on outdoor furniture?

Plastic furniture: diluted bleach (1:1) is okay for tough stains. Wood: never—damages wood. Metal: can cause corrosion. Wicker: may damage fibers. Always test on small area first.

How do you protect outdoor furniture from fading?

Automotive wax (metal, plastic), furniture oil (wood), fabric protector spray (wicker), UV protectant spray (all materials). Store or cover when not in use, especially in winter.

How often should you clean outdoor furniture?

Annually at minimum. Clean at beginning of season before use. Spot clean spills immediately. Deep clean (disassemble, scrub all parts) every 2-3 years or when furniture looks dirty.

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Next Steps

Ready to clean your outdoor furniture?

• Cedar Deck Cleaning
• Composite Decking Guide
• Choosing the Right Cleaner
• Pressure Washing Basics