Anodized aluminum is a common marine material used in many ways: Supports for bimini tops & enclosures; tuna towers; frames for hatches and windshields; sail masts & booms; outriggers, ladders & other trim. Aluminum is particularly susceptible to degradation from salt air and salt water. 303 is an excellent, super-easy way to keep aluminum looking like new and to protect from salt air & salt water degradation. (Wax can do this, too, but wax is less effective, doesn't last as long and is so much more difficult to apply that it's rarely used this way). In addition, 303'd aluminum repels air, water, smudging, soiling, fish blood and scales.
ALSO: Racing sailers (and sailboarders) '303' their masts to cut the drag coefficient. Knowledgeable boat owners treat instrument bezels and other colored anodized aluminum (usually black) to revitalize the color & prevent fading... against which 303's powerful UV screening agents are effective.
