Yes both the used for outdoor purposes Outdoor furniture or patio furniture is made specifically to hold up to the weather. For example, aluminum is a popular choice for commercial outdoor furniture because it is rust-resistant. Untreated steel does not typically fare as well on patios and will rust when exposed to moisture. Another common example is wood furniture on a patio. It can be tempting to put a reclaimed table top outside, but it is sure to absorb moisture and warp, leaving you out of luck on your investment.