Powder-coated steel is the most versatile, strong and, finished over a primer, durable in the damp Eastside winters in nearly any color. Aluminum will not rust, making it a smart choice for moisture-prone spots, and for lakeside decks we use 316-grade stainless. Tempered glass and stainless cable both hold up well outdoors here. We help you weigh the options for your specific deck and exposure.