303 Golden Eagle
303 Products offers a few different marine formulas depending on whether you need to protect metal components from rust, or protect vinyl, rubber, and fiberglass from UV degradation.
If you are specifically targeting metal corrosion, the brand manufactures a dedicated aerosol coating. However, their classic UV protectants are often mistakenly called "corrosion protection" by boaters because they stop the weathering and breakdown of soft surfaces.