Profile: Southwest Metal Systems, LLC is a provider of metal roof panels. We supply Lifetime Metal Roofing Systems. Our Galvalume® is the trade name for a patented sheet steel product having a coating of corrosion-resistant aluminum-zinc alloy applied by a continuous hot dipping process. Our 24ga painted standing seam roofs have a baked enamel Kynar500/Hylar5000 paint finish with the new premium cool coating from BASF called Ultra-Cool.