Why NZ's Climate Makes Powder Coating Essential for Outdoor Furniture
New Zealand's outdoor environment is tough on metal furniture. High UV levels, humidity, and coastal salt spray create challenging conditions that quickly degrade standard paint finishes.
New Zealand experiences some of the highest UV radiation levels in the world, thanks to our position under the thinner portion of the ozone layer. This intense UV exposure breaks down conventional paint films far more rapidly than many people expect, leading to fading, chalking, and eventual flaking. For metal outdoor furniture that sits in direct sunlight for months on end, this is a significant challenge.
In Auckland and across much of the upper North Island, coastal salt air adds another layer of attack. Airborne salt particles settle on metal surfaces and accelerate corrosion, particularly at any point where a paint film has been chipped or scratched. Couple this with daily temperature swings that cause metal to expand and contract — stressing the coating with each cycle — and it becomes clear why standard brush-on or spray-can finishes rarely hold up on outdoor furniture in NZ.
Powder coating is fundamentally tougher than conventional paint. The cured finish is thicker, more flexible, and more resistant to UV degradation, chipping, and chemical attack. It does not crack and peel the way solvent-based paint tends to when exposed to the combination of UV, moisture, salt, and temperature cycling that defines our outdoor environment. For metal outdoor furniture in New Zealand, it is one of the best protective finishes available.
Common Outdoor Furniture We Restore and Coat
Our Auckland workshop handles a wide variety of outdoor furniture items, from commercial settings to family backyards.
Garden tables and chairs are among the most common items we see — both steel and aluminium framed sets that have lost their finish after a few seasons outdoors. Sunloungers, deck chairs, and other poolside furniture are regular arrivals too, often brought in during winter when they are not in use so they are ready for the next summer.
We also handle larger items such as park bench seats, commercial outdoor settings for cafes and restaurants, BBQ trolley frames and surrounds, and balcony or terrace furniture. Pot stands, garden arches, and decorative metalwork features are popular restoration projects as well — items that are structurally sound but have lost their visual appeal due to weathering and rust.
Pool fencing sections and gates are another common category, where both appearance and corrosion protection matter. Whether it is a single garden chair or a full commercial dining set, if the frame is metal, powder coating is likely the best way to protect it and give it a fresh, long-lasting finish.
When to Restore vs Replace
Many items that look ready for the tip can be fully restored through sandblasting and powder coating at a fraction of the cost of replacement.
The key question is structural integrity. If the metal frame is solid — no cracks, no rust-through holes, no bent or weakened sections — then it is almost certainly worth restoring rather than replacing. Surface rust, flaking paint, and general weathering are cosmetic issues that sandblasting and powder coating will address completely. What looks like a piece of furniture ready for the skip can often come out of our workshop looking better than new.
Sandblasting reveals the true condition of the metal underneath. Once the old coating and surface rust are removed, you can see exactly what you are working with. In most cases, the metal underneath is in far better condition than the exterior appearance suggests. Solid steel construction and quality aluminium frames are excellent candidates for restoration — these materials are built to last, and a new powder coat finish gives them a fresh lease of life.
The only items that are genuinely not worth restoring are those with significant structural rust-through, where the metal has thinned or perforated to the point where it can no longer support weight safely. If you are unsure, bring the item in and we will give you an honest assessment of whether restoration is the right option.
The Restoration Process
Bringing outdoor furniture back to life at Coating Lab involves a thorough, multi-step process.
The process begins with an inspection when you drop the item off at our Onehunga workshop. We assess the overall condition, discuss your colour and finish preferences, and identify any issues that need attention. If the item has old paint, rust, or other surface contamination, the first step is sandblasting to strip it back to clean, bare metal.
Once blasted, the bare metal surface is inspected again. This is where any hidden damage becomes visible. If minor repairs are needed, these can be addressed before moving to the next stage. The cleaned surface is then pre-treated to ensure the powder coating will bond properly — the specific pre-treatment depends on whether the substrate is steel or aluminium.
With the surface prepared, the powder coating is applied electrostatically in your chosen colour and finish, then the item goes into the curing oven where the powder melts, flows, and hardens into a tough, durable film. After curing, the finished piece is inspected for quality before it is ready for collection. The result is a finish that is uniform, durable, and ready to face New Zealand's outdoor conditions.
Colour Ideas for Outdoor Furniture
Choosing a new colour is one of the most enjoyable parts of the restoration process — a chance to modernise an older piece.
Choosing a new colour is one of the highlights of restoring outdoor furniture. Matte black and charcoal grey remain the most popular choices for their clean, modern look and versatility with any outdoor scheme. White is a classic for traditional garden settings, while deeper tones like dark green, bronze, and heritage colours can complement specific garden styles and building palettes.
If you are restoring a matching set — a table and chairs, for example — powder coating ensures every piece comes out in exactly the same colour and finish, which is difficult to achieve with brush or spray-can painting. For items with minor surface imperfections that sandblasting cannot fully smooth out, textured finishes such as hammertone or fine texture can conceal these while adding visual character.
All our colours are specified using the RAL colour chart system, so you can reference a specific number and know exactly what you will get. If you have a particular colour in mind — perhaps to match existing painted surfaces on your home or deck — bring a sample and we can help find the closest available match.
Caring for Powder Coated Outdoor Furniture
With proper care, powder coated outdoor furniture will maintain its appearance and protection for many years.
The good news is that powder coated furniture is low maintenance. A regular wash with warm water and a mild detergent — standard dish soap works well — is all that is needed to keep it looking its best. Use a soft cloth or sponge and rinse thoroughly with clean water afterwards. This simple routine removes dirt, pollen, bird droppings, and other deposits before they can stain or degrade the surface.
Avoid abrasive cleaners, scouring pads, and steel wool, as these will scratch and damage the powder coated surface. If you live in a coastal area, it is worth rinsing your furniture down with fresh water on a regular basis to remove salt deposits, which can be corrosive over time if allowed to accumulate. While powder coating is highly chip-resistant, protecting furniture from heavy impacts — such as dragging it across concrete — will help keep the finish intact.
If over time the coating does show signs of wear, fading, or localised damage, items can be brought back for recoating. The process involves stripping the old coating, re-preparing the surface, and applying a fresh powder coat — essentially giving the piece another full lifecycle. For items that are only used seasonally, storing them under cover or indoors during the worst of winter can help extend the finish even further.
Frequently Asked Questions
Yes. Outdoor furniture is one of the most common items we powder coat. Steel and aluminium garden tables, chairs, bench seats, sunloungers, BBQ frames, and pool fencing are all well suited to powder coating. The finish provides excellent protection against UV, moisture, and general outdoor wear. If you are unsure whether your specific item can be accommodated, get in touch and we can advise based on the size and type of piece.
For outdoor metal furniture, powder coating generally outperforms conventional paint significantly. The cured powder coat film is thicker, harder, and more resistant to chipping, scratching, UV fading, and moisture penetration than standard liquid paint. In New Zealand's high-UV, often coastal environment, this difference in durability is particularly noticeable. Powder coating also produces no drips or runs and provides a more uniform finish than hand-applied paint.
The longevity of a powder coated finish depends on several factors, including the quality of surface preparation, the powder specification used, the environment the item is exposed to, and how well it is maintained. Items in sheltered, inland locations will generally retain their finish longer than those in exposed coastal positions with constant salt spray. Regular cleaning and avoiding impact damage will help extend the life of the coating. Contact us to discuss the best coating specification for your specific location and application.
Yes, in most cases. Sandblasting removes rust and old coatings completely, taking the metal back to a clean, bare surface ready for powder coating. Even heavily rusted items can often be successfully restored, provided the metal underneath is still structurally sound. If rust has eaten through the metal to the point where it has thinned or perforated, restoration may not be viable. If you are unsure, bring the item in and we will give you an honest assessment of whether it can be saved.