On ordinary aluminium wheels, a coating is typically a layer of baked
powder that sits on top of the wheel surface. When scratched, water and salt
will penetrate the coating, resulting in corrosion and further
With Alcoa Dura-Bright® wheels, the patented treatment actually
penetrates the aluminium, forming a protective shield that becomes an integral
part of the wheel. It prevents cracking, peeling and filiform corrosion often
seen on coated wheels.