Sure, you should be able to!
I´ve found some photos on flickr, where people have used an ND8 for coastal shots.
http://www.flickr.com/photos/35994600@N04/5263728543/
www.flickr.com/photos/johnogonzalez/3348786698/ www.flickr.com/photos/staalen/3920090483/ Of course, time of day, clouds etc etc will all effect how your shot turns out, but the ND8 should allow you to get a slow enough shutter speed to get a good misty shot.
Oh and don´t forget to post your results here Tony, I´d be interested to see them.
James