Whilst all metal furniture will degrade over time outdoors, Alexander Rose is able to offer a market leading 5-year warranty on its Portofino range. All items are fabricated carefully using ultra-modern techniques to protect the furniture and prevent corrosion. During the manufacturing process every piece of furniture is individually chemically treated, primed and then powder-coated to ensure a top grade finish and maximum rust resistance. If you do see any fly rust appearing, this will not be corrosive and can be cleaned off using WD40.