Metal wall art is made to last, but in New Zealand the metal you choose matters as much as the design. Between coastal salt, hard UV, frost and driving rain, our conditions are tough on anything that lives outside. I've been making steel art in Auckland since 2007, and this is how I'd explain the differences to someone standing in my studio.
For most homes, powder-coated steel is the sweet spot. I start with high-grade 304 steel, the same grade as a good stainless BBQ, then powder coat it in your colour. The coating seals the steel so it won't rust, holds its colour against our sun, and shrugs off rain and frost. It's happy indoors and out, which is why it's on most of my walls.
Corten, or weathering steel, is made to rust on purpose. Over a few months it forms that warm orange patina people love in a garden, and it copes well with coastal salt air. The trade-off is the rust runoff, which can stain paving or a pale wall below it, so I only put it where that won't bother you. One thing I'll always tell you: corten should never be powder coated. It keeps rusting under the coating, the moisture gets trapped, and eventually the coating lifts and fails.
If you're right on the water, brushed marine-grade 316 stainless is the safest bet. It's the grade used on boats, so it handles salt far better than ordinary steel. I leave it brushed rather than coated, for a clean modern finish that won't fade.
Aluminium is naturally corrosion-resistant and much lighter than steel, so it's useful for bigger pieces where weight matters. Powder-coated aluminium is another solid coastal choice. I finish it the same way as steel.
Two materials get sold as metal art that I'd steer you away from for anything you want to keep.
Aluminium composite sounds like solid metal, but it isn't. It's two very thin aluminium skins bonded to a plastic core, made for signage and lightweight cladding. The edges can expose that plastic core over time, and outdoors the layers can separate with heat and UV. It feels light and hollow on a wall next to solid steel.
Acrylic, often called Perspex, is a plastic, not a metal at all. It's cheap and easy to cut, which is why it turns up in décor, but it fades and goes brittle in our sun, scratches easily, and never has the weight or presence of steel. Fine for a short-term piece, not for something you want to last.
Inside, you can choose on looks alone: powder-coated steel, stainless or aluminium all work beautifully. Outside, stick to powder-coated steel, powder-coated aluminium, marine-grade 316 stainless or corten, and remember that a sheltered wall always has an easier life than one in full sun and salt wind.
If you'd like help picking the right metal for your spot, just ask, or browse the full range of metal wall art.
For most homes, powder-coated high-grade steel gives the best all-round durability. Right on the coast, brushed marine-grade 316 stainless or powder-coated aluminium are the safest, and corten suits gardens where a little rust runoff won't matter.
No, and I'd never do it. Corten keeps rusting underneath the coating, moisture gets trapped, and in time the coating lifts and fails. Corten is best left in its natural weathered form.
They're both excellent, just for different spots. Powder-coated steel gives you any colour and suits most homes. Brushed marine-grade 316 stainless is the one I reach for right on the coast, where salt is harshest.
No. Aluminium composite is two thin aluminium skins over a plastic core, made for signage. It's lighter and less durable outdoors than solid steel or aluminium, and the edges can expose the core over time.
Not well. Acrylic is a plastic, so it fades, goes brittle and scratches with sun and time. For something you want to keep outdoors, steel or aluminium is a far better choice.
High-grade 304 steel for powder-coated pieces, marine-grade 316 stainless for coastal work, corten for the garden, and aluminium where weight matters. Everything is cut and finished by hand in Auckland.
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