In a harsh environment such as warm/salt water and sunlight, steel, stainless steel, and aluminum are subject to rust, which creates pant longevity issues, and as always the "eye sore" of the damage.
Correctly prepared and powder coated parts will protect your investment and be pleasing to the eye for many many years.
Benefits of powder coating are, you can customize your boat to your proper team colors, or even customize your boat or jet ski to your own personality.
There are many types of coatings and finishes available to help protect your prize possession.