re: Best boat cover

It's an older boat 2005 seafox that still looks clean after being scrubbed and waxed but it sits under the sheds in hopedale marina and they drop rust flakes and the occasional bird dropping so after cleaning as soon as I come back the next time it's back to dirty. I'm just looking for something the minimize that. But I also understand that this boat probably has a 5 year timer on it so have to take that into consideration