Baldwin's proprietary Lifetime Finishes™ in polished brass, polished and satin nickel, create a surface highly resistant to the effects of weather and normal wear and tear, including coastal applications. All Lifetime finishes are not alike. Baldwin developed the first Lifetime PVD finish more than 20 years ago and it continues unmatched today. That's why we back it up with an industry-best Lifetime Finish Warranty. Baldwin’s patented PVD (Physical Vapor Deposition) finishing uses a sophisticated formulation of layered nickel alloys to create crisp detailing and brilliantly pure color. It interrupts the aging process and provides outstanding resistance to corrosion in even the harshest salt air environments. Typical “lifetime” finishes of competitors have only two layers – half as many as Baldwin’s, making ours 89% thicker